[lecture 5] tissues and organs

Question 1

types of tissues

Answer 1

epithelial, nervous, connective, muscle

Question 2

epithelial tissue function + description

Answer 2

• epithelial tissue forms linings between organs
• acts as a barrier to protect contents of cell
• regulates movement in and out of cells

Question 3

features of epithelial cells

Answer 3

simple (1 layer)
stratified (2 or more layers)
flat - squamous
cuboidal - intermediate
columnar - columns

Question 4

connective tissue function + description

Answer 4

• embedded in a fibrous matrix called
  the extracellular matrix
• connects other tissues together and provided mechanical properties like elasticity
• acts as an energy store – fat cells are a common component of connective tissue

Question 5

muscle tissue function + description

Answer 5

• made of fibers which can contract
• cells that make up muscle tissue use a lot of energy therefore have a lot of mitochondria
• force is generated by two types of fibrous proteins they contain which
  can pull against one another. they are called actin and myosin

Question 6

3 types of muscle tissues

Answer 6

skeletal muscle
smooth muscle
cardiac muscle

Question 7

nervous tissue function + description

Answer 7

• mainly made up of neurons
• transmit information around the body as electrical impulses called action potentials
• brain, spinal cord and nerves are made of nervous tissue