Chapter 8 Flashcards
What is a tissue?
-a group of cells with the same job
What is histology?
-the biology of tissues
What are the principle types pf tissue?
- Epithelial
- Connective
- Muscle
- Nervous
Describe epithelial tissue.
-covers body surfaces, lines hollow ducts and forms glands
Describe connective tissue.
- protects, supports, and binds organs
- stores energy as fat, provides immunity
Describe muscle tissue.
-generates movement and heat
Describe nervous tissue.
- detects changes in the body and responds by generating nerve impulses
- allows body to communicate
What are the three primary germ layers?
- Endoderm
- Ectoderm
- Mesoderm
What tissue or organ derives from the endoderm?
- lining of lungs, gi tract, hepatic and pancreatic ducts
- kidney ducts and bladder
What tissue or organ derives from the ectoderm?
- epidermis of skin
- tooth enamel
- cornea of eye
- outer ear
- nasal cavitiy
- skeletal muscles in head
- brain and spinal cord
- sensory neurons
What tissue or organ derives from the mesoderm?
- dermis of skin
- circulatory system
- glands
- kidneys
- gonads
- muscle
- bones (except facia)
What is ECM?
-the fluid environment that fills the space between the cells of the body
What three fibers make up the ECM?
- collagen
- elastic fibers
- reticular fibers
What is the purpose of the ECM?
-supports and binds cells, stores water, allows exchange between blood and cells
What are body membranes?
-sheetlike structure that covers and protects the body surface, lines body cavities, and covers the inner surfaces of hollow organs
What are the two types of body membranes?
- epithelial membranes
- connective tissue membranes
What are the three types of epithelial membranes?
- Cutaneous
- Mucous
- Serous
Describe the cutaneous membrane and where it’s found.
- covers body surfaces that are exposed to the external environment
- skin
Describe the mucous membrane and where it’s found.
- lines the body surfaces that are open to the exterior
- respiratory tract, urinary tract, digestive tract
Describe the serous membrane and where it’s found.
- lines cavities that are not open to the external environment
- covers the organs inside the cavitites
- secretes a thin, watery fluid that lubricates organs
Where do you find connective tissue membranes and what makes then distinct from epithelial membranes?
- Synovial membranes
- DO NOT have a basement membrane
- secretes synovial fluid
- lines the spaces between bones and joints
