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Human Body Histology Test
Terms in this set (38)
What are the 4 different types of tissues?
Epithelial, Connective, Muscle, and Nervous.
What are the levels of organization?
What is the Nervous Tissue responsible for and what is its primary cell?
The nervous tissue is responsible for sending messages through the body. Its primary cell is the neuron.
What are the nervous system's support cells?
Glial cells, astrocytes, Schwann cells, and Oligodendrocytes.
How are signals sent through the nervous system?
Signals are sent via action potentials on the axon (Electrical impulses).
What are Schwann cells and what do they do?
Schwann cells are found in the PNS (Peripheral Nervous System) and they create myelin sheaths which forces impulses to "jump".
What are the gaps between Schwann cells called?
Nodes of Ranvier.
What is the jumping signal called?
The jumping signal is called saltatory conduction.
What are Oligodendrocytes?
Oligodendrocytes are in the CNS (Central Nervous System) and they function similar to the Schwann cells by creating myelin sheaths which force impulses to "jump".
What is the difference between Schwann Cells and Oligodendrocytes?
Oligodendrocytes unlike Schwann Cells have many arms to create many myelin sheaths.
What are astrocytes?
They transfer nutrients from the blood.
What is Epithelial Tissue's function and what does it consist of?
Epithelial Tissue either is covering tissues or lining tissues. It consists of Simple Squamous, Stratified Squamous, Simple Cuboidal, Simple Columnar, and Psuedostratified Ciliated Columnar.
Is Epithelial Tissue only one layer?
No, Epithelial Tissue may either be one layer (simple) or many layers (stratified).
What is simple squamous, its location and function?
Simple squamous is a type of epithelial tissue and its location is in the lung and its function is that it allows diffusion (osmosis).
What is important about stratified squamous?
Stratified squamous may be keratinized or non-keratinized. Skin is keratinized and the mouth, vagina or espohagus is non-keratinized.
What is stratified squamous, its location and function?
Stratified squamous is a type of epithelial tissue and its location is in the skin/sweat gland and its function is covering.
What is simple cuboidal, its location and function?
Simple cuboidal is a type of epithelial tissue and its location is in the kidney and its function is that it makes tubes.
What is simple columnar, its location and function?
Simple columnar is a type of epithelial tissue and its location is in the intestines (duodenum) and its function is absorption.
What is pseudostratified ciliated columnar, its location and function?
Pseudostratified ciliated columnar is a type of epithelial tissue and its location in the trachea and its function is to capture and move dust/mucus.
What is muscle tissue and what does it consist of?
Muscle Tissue have the ability to shorten or contract in order to produce movement of the body parts. It consists of Cardiac, Skeletal, and Smooth.
What is Cardiac muscle, its location and function?
Cardiac muscle makes up the heart and it is found in the heart and its function is to pump blood.
What is Skeletal muscle, its location and function?
Skeletal muscle is on bones and its found on the tongue, abdominal wall, and on bones and its function is to allow movement.
What is Smooth muscle, its location and function?
Smooth muscle surrounds internal organs and it is found in the stomach, intestines, liver, pancreas, uterus, bladder, and colon and its function is to peristalsis/stomach churning.
What is Connective Tissue and what does it consist of?
Connective Tissue supports, protects, and gives structure to other tissues and organs in the body. It consists of blood, loose areolar connective tissue, dense regular connective tissue, dense irregular connective tissue, osseous tissue, and cartilage.
What is blood tissue, its location and its function?
Blood is found in the blood vessels and its function is that it transports nutrients, gases, etc.
What is osseous tissue, its location and its function?
Osseous Tissue is found in bones and its function is structure and mineral storage.
What is loose areolar connective tissue, its location and its function?
Loose areolar connetive tissue is found beneath the epidermis around every blood vessel and its function is to package the organs (like Saran wrap).
What is dense regular connective tissue, its location and its function?
Dense regular connective tissue is found in ligaments (bones to joints or bones to bones) and tendons (connections between cartilage or bones and muscle) and its functions is to transfer forces to bones.
What is dense irregular connective tissue, its location and its function?
Dense Irregular connective tissue is found in the dermis and its function is to provide strength which makes the skin resistant to tearing by stretching forces from different directions.
What are the 3 different types of Cartilage and what cell are they based on?
The 3 different types of Cartilage are Hyaline Cartilage, Elastic Cartilage, and Fibrous Cartilage (Fibrocartilage). They are based on cells called chondrocytes, but their matrix composition varies.
What is Hyaline Cartilage, its location and function?
Hyaline Cartilage is found in the trachea, nose, larynx and at the end of the bones and its function is provide structure and joints.
What is Elastic Cartilage, its location and function?
Elastic Cartilage is found on the tip of nose and ears as well as the larynx, and the eustachian tube and its function is that it provides structures subjected to frequent deformation.
What is Fibrous Cartilage (Fibrocartilage), its location and function?
Fibrocartilage is found in intervertebral discs and have a spongy consistency, and its function is to provide tough material of the intervertebral discs.
What is elastin?
Fibrous tissue made from protein similar to collagen that forms elastic tissue found in the dermis.
What is collagen?
Fibrous tissue made from protein that gives the skin form and strength.
What are striations?
"Stripes" on muscles.
What are intercalated discs?
Connects cardiac muscle together.
What are osteocytes?
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