Chapter 33.2- Tissues and organs

Question 1

What are tissues?

Answer 1

tissues are a combination of cells that carry out special functions and create organs

Question 2

What are the components that makeup skin?

Answer 2

1. outer layer is the epidermis ( an epithelial tissue
2. The inner layer is the dermis ( a connective tissue)

Question 3

What is the role of an epithelial tissue?

Answer 3

• provides a linining for inside and outside the body

Question 4

What is the role of an epithelial tissue?

Answer 4

• provides a lining for inside and outside the body
• absorbs substances and releases substances
• made of closely compressed cells

Question 5

What are ways in which epithelial cells can be classified

Answer 5

1. Number of layers 1 layer=simple more layers= stratified
2. The shape of cells: flat= squamos cell, square/circle = cubodial tall cells=columar

Question 6

Where does epithelial cells get access to blood?

Answer 6

through connectivity tissues that are underneath it

Question 7

What are the components of connective tissues?

Answer 7

it is made up of extracellular matrix which contain polysaccharides

Question 8

How can connective tissues be classified?

Answer 8

they have two layers underneath the epithelial tissue:

1. Basa lamina: specialized group of tissue
2. Dermis: secretes the content of the extracellular matrix

Question 9

What are the functions of connective tissues?

Answer 9

dermis: contains strong blood vessels that nourish the body and provides a cushion for the body

Bones cartilage ligments: supports the body and provides levers of movement

Adipose tissue: Provides tissue and fat for cells

Question 10

What are the components of muscle tissues?

Answer 10

• made up of fibers that can contract
• contain actin and thick myosin (motor protein that uses ATP to change conformation)
  present in bilateralians

Question 11

What are the three types of muscle tissues?

Answer 11

1. sketetal muscle: attach muscle to bone to move
2. cardiac muscle: found in heart to make it beat
3. smooth muscle: within the gut to push the movement of food and blood into vessels

Question 12

What are the function of the nervous system?

Answer 12

• send signals throughout body to maintain homeostasis

Question 13

What are the components of the nervous system?

Answer 13

• made up of neurons that communicate at synpases ( where chemical signals are released)

Question 14

echnioderms facts

Answer 14

• ## 5 radical planes of symmetry

Question 15

Arthpods

Answer 15

have hard extoskeletons and segmentated bodies