Tissues (Ch.23) Flashcards
Tissues
A group of cells of the same type that perform a particular function.
A group of cells of the same type that perform a particular function.
Tissues
Four general classes of tissues
- Epithelial
- Connective
- Muscle
- Nerve
Organs
Body structures made up of several different tissues grouped together.
Body structures made up of several different tissues grouped together.
Organs
Organ System
A group of organs that work together to carry out an important function.
A group of organs that work together to carry out an important function.
Organ System
The epithelium function in three ways
- to protect tissues beneath them from dehydration
- to provide sensory surfaces
- to secrete materials
How are epithelial tissues classified?
Classified into three types according to their shapes:
- squamous (flat)
- cuboidal
- columnar
Simple epithelium
Kind of epithelial layer. It has only one cell layer and is important for exchanging materials across it.
Kind of epithelial layer. It has only one cell layer and is important for exchanging materials across it.
Simple epithelium
Stratified epithelium
King of epithelial layer. Multiple cell layers in thickness and provides cushioning and protection. It is found in skin and it continually replaced.
King of epithelial layer. Multiple cell layers in thickness and provides cushioning and protection. It is found in skin and it continually replaced.
Stratified epithelium
Cuboidal epithelium
has a secretory function and often forms glands
Endocrine glands
secrete hormones into the blood
Exocrine glands
have ducts that open to the body’s outside. Secrete sweat, saliva, milk, and digestive enzymes
Connective tissues are put into three functional categories. What are the categories?
- Defense (cells of the immune system)
- Support (cells of the skeletal system)
- Transport and storage (blood and fat cells)
Matrix
- Common structural feature that connective tissues share.
- Abundant extracellular material, between widely spaced cells.
- Secretion of materials into matrix produces bone and cartilage.
Macrophages
Kind of immune cells that engulf and digest invaders.
Kind of immune cells that engulf and digest invaders.
Macrophages
Lymphocytes
Kind of immune cells that attack virus-infected cell or make antibodies.
Kind of immune cells that attack virus-infected cell or make antibodies.
Lymphocytes
Fibrous connective tissue
Kind of skeletal connective tissue. Made of cells called fibroblasts that secrete structural proteins in the spaced between cells.
Example: collagen
Kind of skeletal connective tissue. Made of cells called fibroblasts that secrete structural proteins in the spaced between cells.
Example: collagen
Fibrous connective tissue
