Connective Tissue Types (Including cartilage, bone, blood and Nervous Tissue)

Connective Tissue Proper: Loose connective Tissue, areolar

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- Description: Gel-like matrix with all three fiber types; cells: fibroblasts, macrophages, mast cells, and some white blood cells

-Function: wraps and cushions organs; its macrophages phagocytize bacteria; plays an important role in inflammation; holds and conveys tissue fluids.

Location: Widely distributed under epithelia of body, e.g., forms lamina propria of mucous membranes; packages organs; surrounds capillaries.

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Terms in this set (15)

Connective Tissue Proper: Loose connective Tissue, areolar

Connective Tissue Proper: loose connective tissue, Adipose

- Description: Matrix as in areolar connective tissue, but very sparse; closely packed adipocytes, or fat cells, have nucleus pushed to the side of large fat droplet.

-Function: Provides reserve food fuel; insulates against heat loss; supports and protects organs

Location: Under skin in the hypodermis, around kidneys and eyeballs; within abdomen; in breasts.

Connective Tissue Proper: loose connective tissue, Reticular

- Description: Network of reticular fibers in a typical loose ground substance; reticular cells lie on the network

-Function: Fibers form a soft internal skeleton (stroma) that supports other cell types including white blood cells, mast cells, and macrophages

Location: lymphoid organs (lymph nodes, bone marrow, and spleen).

Connective Tissue Proper: Dense connective Tissue, Dense Irregular

- Description: Primarily irregularly arranged collagen fibers; some elastic fibers; major cell type is the fibroblast; defense cells and fat cells are also present.

-Function: Able to withstand tension exerted in many directions; provides structural strength

Location: Fibrous capsules of organs and of joints; dermis of the skin; submucosa of digestive tract.

Connective Tissue Proper: Dense connective Tissue, Dense Regular

- Description: Primarily parallel collagen fibers; a few elastic fibers; major cell type is the fibroblast

- Function: Attaches muscles to bones or to muscles; attaches bones to bones; withstands great tensile stress when pulling force is applied in one direction

Location: Tendons, most ligaments, aponeuroses

Connective Tissue Proper: Dense connective tissue, Elastic

-Description: Dense regular connective tissue containing a high proportion of elastic fibers.

-Function: Allows recoil of tissue following stretching; maintains pulsatile flow of blood through arteries; aids passive recoil of lungs following inspiration

Location: Walls of large arteries; within certain ligaments associated with the vertebral column; within the walls of the bronchial tubes.

Cartilage: Hyaline

Description: Amorphous but firm matrix; collagen fibers form an imperceptible network; chondroblasts produce the matrix and when mature (chondrocytes) lie in lacunae.

Function: Supports and reinforces; serves as resilient cushion; resists compressive stress.

Location: Forms most of the embryonic skeleton; covers the ends of long bones in joint cavities; forms costal cartilages of the ribs; cartilages of the nose, trachea, and larynx.

Cartilage: Elastic

Cartilage: fibrocartilage

Description: Matrix similar to but less firm than that in hyaline cartilage; thick collagen fibers predominate

Function: Tensile strength with the ability to absorb compressive shock

Location: Intervertebral discs; pubic symphysis; discs of knee joint

compact Bone

Description: Hard calcified matrix containing many collagen fibers; osteocytes lie in lacunae. Very well vascularized.

Function: Supports and protects (by enclosing); provides levers to the muscles to act on; stores calcium and other minerals and fat; marrow inside bones is the site for blood cell formation (hematopoiesis).

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physical science

Contrast types of forces, and give an example of each.

Contact Forces	Noncontact Forces
Description:	Description:
Example:	Example:

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computer science

What are the advantages of fiber optics over copper as a transmission medium? Is there any downside of using fiber optics over copper?

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physics

A computer program gives the result 1/6 for the sum of the series $\sum_{n=0}^{\infty}(-5)^{n}$ . Show that this series is divergent. Do you see what happened? Warning hint: Always consider whether an answer is reasonable, whether it’s a computer answer or your work by hand.

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engineering

Certain wood stove designs rely exclusively on heat transfer by radiation and natural convection to the surroundings. Consider a stove that forms a cubical enclosure, $L_{s}=1 \mathrm{m}$ on a side, in a large room. The exterior walls of the stove have an emissivity of $\varepsilon=0.8$ and are at an operating temperature of $T_{s, s}=500 \mathrm{K}$ . The stove pipe, which may be assumed to be isothermal at an operating temperature of $T_{s, p}=400 \mathrm{K}$ , has a diameter of $D_{p}=0.25 \mathrm{m}$ and a height of $L_{p}=2 \mathrm{m}$ , extending from stove to ceiling. The stove is in a large room whose air and walls are at $T_{\infty}=T_{\mathrm{sur}}=300 \mathrm{K}$ . Neglecting heat transfer from the small horizontal section of the pipe and radiation exchange between the pipe and stove, estimate the rate at which heat is transferred from the stove and pipe to the surroundings.