Four main types of cell are

This type of tissue is commonly seen outside the body as coverings or as linings of organs and cavities.

Are characterized by closely-joined cells with tight junctions (i.e., a type of cell modification).

Serve as barriers for pathogens, mechanical injuries, and fluid loss.

Distinct arrangement of cells that make up epithelial tissue

For secretion

Brick-shaped cells; for secretion and active absorption

Plate-like cells; for exchange of material through diffusion

Multilayered and regenerates quickly; for protection

Single layer of cells; may just look stacked because of varying height; for lining of respiratory tract; usually lined with cilia (i.e., a type of cell modification that sweeps the mucus).

Connective tissue is compose of

Made up of plasma (i.e., liquid extracellular matrix); contains water, salts, and dissolved proteins; erythrocytes that carry oxygen (RBC), leukocytes for defense (WBC), and platelets for blood clotting.

Made up of loose connective tissue that is found in the skin and fibrous connective tissue that is made up of collagenous fibers found in tendons and ligaments.

Example of loose connective tissues that store fats which functions to insulate the body and store energy

Characterized by collagenous fibers embedded in chondroitin sulfate.

Are the cells that secrete collagen and chondroitin sulfate.

Functiona as cushion between bones.

Bone-forming cells

Deposits collagen

Mineralized connective tissue made by bone-forming cells called osteoblasts which deposit collagen.

Combination of the matrix of collagen that makes the bone hard.

Are found at a central canal surrounded by concentric circles of osteons.

Allow the body to move voluntary and involuntary

These tissues are composed of long cells called muscle fibers that allow the body to move voluntary or involuntary.

Is a response to signals coming from nerve cell

Muscle tissue can be characterized

Striated; voluntary movements

Striated with intercalated disk for synchronized heart contraction; involuntary

Not striated; involuntary

This type of tissue is composed of nerve cells called neurons and glial cells that function as support cells

Is the part of the neuron that receives impulses from other neurons.

Part where the impulse is transmitted to other neurons.

3 types of neuron

Nervous tissues are composed of nerve cell called

Examples of connective tissue proper (CTP)