Anatomy

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Chapters 1-4; 12 Labs 1-2

Levels of Structural Organization

Maintaining Boundary
Movement
Responsiveness or Irritability
Digestion
Metabolism
Excretion
Reproduction
Growth

8 Necessary Life Functions

Homeostasis

body's ability to maintain relatively stable internal environments in the face of change.

Negative Feedback

A primary mechanism of homeostasis, whereby a change in physiological variable triggers a response that counteracts the initial change.

Gross Anatomy

the study of body structures you can see with your naked eye.

Anatomical Position

human body is erect, with hand and toes pointed forward and arms hanging at the sides with palms facing forward.

Abdominal

the anterior body trunk region inferior to the ribs.

Antecubital

the anterior surface of the elbow.

Axillary

the armpit.

Brachial

the arm.

Buccal

the cheek.

Carpal

the wrist.

Cervical

the neck region.

Coxal

the hip.

Deltoid

the roundness of the shoulder.

Digital

the fingers or toes.

Femoral

the thigh.

Fibular

the side of the leg.

Inguinal

the groin.

Mammary

the breast.

Manus

the hand.

Nasal

the nose.

Oral

the mouth.

Orbital

the bony eye socket (orbit).

Patellar

the anterior knee (kneecap) region.

Pelvic

the pelvis region.

Pubic

the genital region.

Sternal

the region of the breastbone.

Tarsal

the ankle.

Thoracic

the chest.

Umbilical

the navel.

Cephalic

the head.

Gluteal

the buttocks or rump.

Lumbar

the area of the back between the ribs and hips; the loin.

Occipital

the posterior aspect of the head or base of the skull.

Popliteal

the back of the knee.

Sacral

the area between the hips.

Scapular

the scapula or shoulder blade area.

Sural

the calf or posterior surface of the leg.

Vertebral

the area of the spinal column.

Superior

above other structures.

Inferior

below other body parts.

Anterior

in front of.

Posterior

behind or toward the back.

Medial

toward the midline.

Lateral

away from the midline.

Cephalad

toward the head; also superior for humans, anterior for four-legged animals.

Caudad (caudal)

toward the tail; also inferior for humans, posterior for four-legged animals.

Ventral

belly side; also anterior for humans, superior for four-legged animals.

Dorsal

backside; posterior for humans, inferior for four-legged animals.

Proximal

toward the point of attachment.

Distal

away from the point of attachment.

Superficial

toward or at the body surface.

Deep

away from the body surface; more internal.

Sagittal Plane

plane that divides the body into right and left parts.

Median/Midsagittal Plane

plane that divides the body into equal right and left parts.

Coronal/Frontal Plane

plane that divides the body into anterior and posterior parts.

Transverse Plane

plane that divides the body into superior and anterior parts.

Cranial Cavity

#1; a dorsal body cavity that houses the brain.

Spinal Cavity

#2, a dorsal body cavity that is surrounded by the vertebral column to protect the spinal cord.

Thoracic Cavity

#4; a ventral body cavity seperated from the rest by the muscular diaphragm(#5). The bony rib cage protects the heart and lungs.

Abdominopelvic Cavity

#8; a ventral body cavity that consists of the abdominal cavity(#6) that houses the stomach, intestines, liver and other organs; and pelvic cavity(#7) that contains the reproductive organs, bladder and rectum.

Cell

the structural and functional unit of all living things.

Nucleus

#1; the control center of the cell (houses it's DNA) and is necessary for cell reproduction.

Chromatin

#15; genetic material (DNA) in threadlike form.

Nucleolus

#16; assembly sites for ribosomes; the actual protein-synthesizing "factories."

Nuclear Envelope/Nuclear Membrane

#2; the double membrane that surrounds the nucleus and separates it from the rest of the cytoplasm.

Nuclear Pores

large openings in the nuclear envelope that allow for communication between the nucleus and the cytoplasm permitting large molecules like protein and RNA molecules to pass easily.

Plasma Membrane

#3; the outer boundary of the cell that controls the movement of materials into and out of the cell; composed of a phospholipid bi-layer with proteins embedded in it.

Ribosomes

#12; particles composed of RNA and protein that are involved with messenger RNA in the synthesis of proteins.

Endoplasmic Reticulum

flattened sacs and tubes that may be continuous with the nuclear membrane.

Rough ER

#5; ER that is studded with ribosomes and is involved in protein synthesis.

Soft ER

#14; ER that is involved in steroid and lipid synthesis.

Golgi Apparatus

#4; membranous system involved in packaging protein molecules for export from the cell, packaging enzymes to lysosomes and processing proteins destined to become part of plasma membrane.

Lysosomes

#11; membrane-bound vesicles that originate from the Golgi and contain strong digestive enzymes; if ruptured, they have the capacity to totally destroy the cell.

Peroxisomes

#6; small lysosome-like membranous sacs containing oxidase enzymes that detoxifies alcohol, hydrogen peroxide, and other harmful chemicals.

Mitochondria

#7; rod-shaped bodies with a double membrane wall; the site of aerobic respiration that uses oxygen to produce ATP; powerplant of the cell.

Centrioles

#10; paired structures oriented at right angles to each other; composed of microtubules and is involved in the formation of mitotic spindle.

Cytoplasm

all the materal and organelles inside the plasma membrane and outside of the nucleus.

Interphase

cell life cycle in which the cell grows and carries on its usual metabolic activities.

Cell Division

cell life cycle in which the cell reproduces itself; two events: Mitosis and Cytokinesis.

Mitosis

division of the nucleus to increase the number of cells for growth and repair.

Cytokinesis

division of the cytoplasm.

Epithelial Tissue/Epithelia/Epi

- tissues that cover surfaces;
- functions: protection, absorption, filtration, excretion, secretion, and sometimes sensory reception.
- cells fit closely together to form membranes or sheet of cells;
- membranes always have one exposed surface=apical surface.
- cells are attached to and supported by basement membrane.
- have no blood supply of their own.

Simple Squamous Epi

Location: lining the kidney glomeruli, kidney tubules, blood vessels and heart, and alveoli and lungs.
Function: diffusion, secretion, filtration

Simple Cuboidal Epi

Location: lining the kidney tubules, glands, and surface of ovary.
Function: secretion and absorption.

Simple Columnar Epi

Location: lining the digestive tract (cont. goblet cells), gallbladder, and ducts of glands.
Function: secretion and absorption.

Pseudostratified Ciliated Columnar Epi

always have goblet cells;
Location: lining the trachea, bronchi, and nasal cavity
Function: propel mucus

Simple Ciliated Columnar Epi

Location: lining the uterine tubes, superior portion of uterus, and male reproductive.
Function: propel mucus

Stratified Squamous Epi

1. Keratinized Stratified Squamous Epi - contains keratin, a waterproofing protein. (waves)
Location: lining the skin
2. Non-Keratinized Stratified Squamous Epi
Location: lining the lips, cheeks, eyes and vagina
Both functions as a protection.

Transitional Epi

Location: lining the urinary bladder, and ureter
Function: distention

Connective Tissue (CT)

- most abundant;
- functions: protect, support, and bind together other tissues of the body.
- made up of many different types of cells and nonliving substances found outside the cells (extracellular matrix).
- highly vascularized, or have a good blood supply. (exception for the ligaments and tendons)

Areolar CT

elastic, reticular, collagen fibers; fibroblast.
Location: underskin, surrounding organs and capillaries.
Function: wrap and protect

Adipose CT

adipocytes (fat cell)
Location: underskin, surrounding kidneys, and behind the eyes.
Function: insulation, protection and energy storage.

Dense Regular CT

collagen fibers; fibroblast
Location: tendons, ligaments and aponeuroses.
Function: tensile strength in one direction

Dense Irregular CT

collagen fibers; elastic fibers.
Location: dermis of the skin, fibrous joints capsules, and submucosal layer.
Function: tensile strength in multiple direction.

Hyaline Cartilage

lacuna; cells=chrondocyte; matrix.
Location: fetal skeleton, ends of long bones, costal cartilage, tip of nose, trachea and larynx.
Function: support, reinforce and cushion.

Elastic Cartilage

like the hyaline but with elastic fibers.
Location: outer ear epiglottis
Function: flex and bend; maintain shape.

Osseous Tissue

cells=osteocytes.
Location: bone
Function: support, protection, and mineral storage.

Integumentary System

- forms the external body covering;
- skin and derivatives: sweat & oil glands, hair, nails;
- protects deeper tissue from injury;
- synthesizes vitamin D;

Epidermis

- superficial region of the skin;
- avascular;
- composed of keratinized stratified squamous Epi.

Keratinocytes

cells that produce keratin.

Dermis

- deep region of the skin;
- mostly made up of dense fibrous CT;
- fairly tear resistant

Hypodermis

- deep to the dermis;
- essentially Adipose tissue;
- not considered part of the skin but anchors it to underlying organs and provides a site for nutrient storage.

Stratum Basale (basal layer)

- IV
- deepest layer of the epidermis;
- highly mitotic (skin cells are formed);
- contains melanocytes;

Melanocytes

- cells that produce melanin;
- shields nuclei from UV damage;

Stratum Spinosum (spinal layer)

- III
- cells contain thick layer of intermediate filaments made of pre-keratin;
- cell division also occurs in this layer but less often than basal layer.

Stratum Granulosum (granular layer)

- II
- layer of the epidermis where cells are beginning to die;
- abundant granules in its cells b/c cells start to fill with keratin;

Stratum Lucidum (clear layer)

layer of the epidermis that is only present in thick skin (palms & soles).

Stratum Corneum (horny layer)

- I
- outermost layer of the epidermis;
- can be many layers thick;
- cells in this layer are dead;
- flattened scalelike remnants of cells are full of keratin.

Papillary Layer

- #1
- upper dermal region;
- contains fingerlike projections called dermal papillae, meissner's corpuscles (pain and touch receptors), and free nerve endings.

Reticular Layer

- #2
- deepest skin layer;
- contains blood vessels, sweat and sebaceous glands, and pacinian corpuscles (pressure receptors).

Dermal Papillae

#3; peg-like projections on the superior surface that indent the overlying epidermis

Hypodermis

#4;

Hair Shaft

#5; the visible part of the hair

Hair Root

#6; The part of the hair contained within the follicle, below the surface of the scalp.

Hair Follicle

#7; narrow cavities in the dermis from which hair grows

Hair Bulb

#8

Arrector Pili Muscle

- #9
- Tiny smooth involuntary muscle attached to hair follicle and dermal papillae;
- contracts when cold or frightened and produces goosebumps

Sebaceous Gland

#10; Oil-secreting gland in the dermis that is associated with hair follicles.

Sudoriferous Gland

#11; Sweat-secreting gland

Sweat Duct

#12

Sweat Pore

#13

Blood Vessels

#14

Pacinian Corpuscle

#15; deep pressure receptor located within or near the hypodermis

Flickr Creative Commons Images

Some images used in this set are licensed under the Creative Commons through Flickr.com. Click to see the original works with their full license.

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