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phgy 170 learning outcomes assignment 10
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PHGY 171: Learning Outcomes Assignment 101. Compare and contrast the four primary tissue types in the body (4 points).
Epithelial Tissues ● Form a protective barrier for the inside of the body from the
outside environment.
● Anything entering the body has to cross this barrier.
● This exchange varies for different epithelial tissues.
1. The Skin
● Made up of many different types of epithelial tissues.
● These tissues come together to perform a common function.
● The skin is an organ.
2. The Glands
● Epithelial cells form pocket-like structures (glands) which they
release secretions into through ducts.
● Exocrine glands: release secretions to outside of the body.
● Endocrine glands: release secretions into the blood stream, do
not have ducts.
3. Digestive Tract
● Epithelial tissues are specialized for absorption, secretion, and
protection.
● Many different epithelial cells are found in the digestive tract,
like in the stomach for example;
○ Epithelial tissue that produces and excretes proteins
form a mucus layer protecting epithelial cells from
acidity of the environment.
○ Epithelial tissue that forms glands that release proteins
and acid to break down food.
○ Epithelial tissues for transportation used to transport
nutrients across epithelial cell layers into the body.
Nervous Tissues ● Composed of specialized cells which carry information
throughout the body through electrical signals.
● Tissue is made up of nerve cells and glial cells.
How They Work
● Movement of charged ions creates electrical potential across
the membrane.
● Nerve cells use this electrical potential as a signal.
● Allows for rapid signalling and communication in the body.
Muscle Tissues ● Made up of cells specialized in contraction.
● Rich in actin-myosin networks as muscle cells have to contract
and generate force.
● Skeletal muscle is responsible for the movement of the
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