2.2 Tissues

Tissue

A group of cells found together in the body; cells within a tissue share an embryonic or

Where is epithelium tissue?

Lining of GI tract organs, skin surface

Where is connective tissue?

Fats and other soft padding, tissue, bone, and tendons

Where is muscle tissue?

Cardiac, smooth, and skeletal muscle

Where is nervous tissue?

Brain, spinal cord, and nerves

Endocrine glands

Ductless gland that releases secretions directly into surrounding tissues, fluids, and hormones through endocrine organs

Exocrine gland

Secretions leave through a duct that leads to the epithelial surface

What muscle tissue is most energy-demanding?

Cardiac

In what ways do tissues respond to injury?

1. Inflammation

2. Vaslolidation: Widening of blood cells

3. Clotting: Forms a network of proteins to trap blood and bind edges of the wound

What tissues regenerate easily?

• Epithelial tissue

• Fibrous connective tissue and bone

What tissue regenerates poorly?

Skeletal muscle

Hyperplasia

Increase in size of a tissue or organ may occur when tissue is strongly stimulated or irritated

Atrophy

Lost mass in tissues, lumps, and rigidity become widespread, blood vessels, and airways become more rigid