Organization of living things

Question 1

levels of organization

Answer 1

Organelles
Cells
Tissues
Organs
Organ systems
Organism

Question 2

Tissues

Answer 2

A collection of a specific type of cell
Examples: muscle nerve, epithelial, connective.

Question 3

Connective tissues

Answer 3

Connective - supports, protects and connects the body’s organs (bone,blood, cartilage, ligaments)
Can be made of living cells and non-living cells material
Connect bone to muscles
Connects blood to body systems (carries nutrients and waste)

Question 4

Epithelial tissues

Answer 4

Epithelial - tightly packed cells that cover surfaces in the body (skin, organs, etc)
One layer thick = easy for substances to pass through ( in the lungs - oxygen and carbon dioxide)
Many layers = protect organs under the layers (skin)

Question 5

Nerve tissues

Answer 5

Very complex tissue for sensory and sending signals throughout the body
Makes up the brain, spinal cord and nerves
Special nerve cells are found in the eyes, ears, skin, nose and mouth.

Question 6

3 kinds of nerve cells

Answer 6

Sensory neurons - carries info from the body to brain
Motor neurons - carries info from brain to muscles to move
Interneurons - carries info between sensory and motor to the brain.

Question 7

Muscle tissue

Answer 7

Muscle tissue - made of cells that contract and release
Some are voluntary - need to think to move them
Some are involuntary - they move without you thinking about them.

Question 8

Organs

Answer 8

A collection of tissues working to perform a specific function

Question 9

Organ systems

Answer 9

A collection of organs working in a specific function

Question 10

Human organ systems

Answer 10

Circulatory - transports blood, nutrients, gases and wastes.
Digestive - ingests, breaks down and absorbs food;solid waste
Respiratory - gas exchange
Excretory - removes liquid wastes
Skeletal - support, protection and movement
Muscular - creates movement