Cells, Tissues and Organs Flashcards
What is an example of an absorptive cell?
Epithelial cells
Describe an epithelial cell.
- Lines the surface of the small intestine
- Absorbs food molecules from gut into bloodstream
- Covered in microvilli
- An absorptive cell
What secretes secretory cells?
Pancreas and pituitary glands
Spleen and lymph nodes
What is the purpose of the pancreas?
To regulate blood sugar levels and aid in digestion
What is the purpose of the pituitary gland?
secrete hormones
What do the spleen and lymph nodes do?
Make antibodies for the recognition and destruction of foreign molecules
What do white blood cells do?
help fight disease
What is the function of nerve cells?
To transmit electrical messages from one part of the body to another
What is the connection between nerve cells called?
Synapses
What makes up a nerve cell?
- Dendrites
- Axon
- Beads of myelin
- Nucleus
- Neuron Soma (cell body)
- Neuron
Can nerve endings regenerate?
Yes, but it may take a very long time
______ send signals to CNS
sensory neurons
______ send signals away from the CNS
motor neurons
What does CNS stand for?
Central nervous system
Sensory neurons are for…
feel
Motor neurons are for…
action
What are the three types of muscle cells?
- Skeletal (voluntary)
- Cardiac
- Smooth (involuntary)
What is an example of a voluntary muscle?
Bicep - you “tell it” to do something
Where is a cardiac muscle found?
The heart and only in the heart
What are smooth muscles?
Organs
What are connective tissues?
Tendons and Ligaments, Elastic tissues, and adipose tissues
Where is elastic tissue?
Between vertebrae, artery walls and trachea
What is adipose tissue?
Fat - cushions and supports vital organs and store excess food
What composes fluid tissue?
Blood and lymph
