Levels of Organisation.

Question 1

What is an organelle?

Answer 1

The structural and functional unit inside cells.

Question 2

What is a cell?

Answer 2

Basic structural and functional units in a living.

Question 3

What is a tissue?

Answer 3

Group of cells of similar structures working together to perform the same function.

Question 4

What is an organ?

Answer 4

Made from different tissues working together to perform specific functions.

Question 5

What is an organ system?

Answer 5

Groups of organs with related functions, working together to perform body functions.

Question 6

What is an organism?

Answer 6

An individual animal, plant, or single-celled life form.

Question 7

What is the order of levels of an organism?

Answer 7

organelle → cell → tissue → organ → organ system → organism.

Question 8

What is the organ system and function of the following organs:

• mouth.
• oesophagus.
• stomach.
• liver.
• pancreas.
• intestines.

Answer 8

organ system = digestive system.
function = to digest food and absorb nutrients.

Question 9

What are the organs and the organ system of the following function:
- to move blood around the body.

Answer 9

organ system = circulatory.

organs = heart and blood vessels.

Question 10

What are the organs and the function of the following organ system:
- gas exchange.

Answer 10

organs = trachea, bronchi, and lungs.
function = to take oxygen and get rid of carbon dioxide.

Question 11

What is the organ system and function of the following organs:

• kidneys.
• bladder.
• urethra.
• ureter.

Answer 11

organ system = excretory system.
function = to get rid of waste.

Question 12

What are the organs and the organ system of the following function:
- to transmit impulses to parts of the body.

Answer 12

organs = brain, spinal cord, and nerves.

organ system = nervous system.

Question 13

What are the organs and the function of the following organ system:
- sensory system.

Answer 13

organs = eyes, ears, nose, tongue and skin.
function = to detect stimuli.

Question 14

What is the organ system and function of the following organs:

• ovaries.
• oviduct.
• uterus.
• urethra.
• vagina.
• penis.
• testis.

Answer 14

organ system = reproductive system.
function = to continue a species.

Question 15

What are the organs and the organ system of the following function:
-to absorb water and mineral ions.

Answer 15

organ system = root system.

organ = root.

Question 16

What are the organs and the function of the following organ system:
- reproduction (in plants).

Answer 16

organs = flowers and fruits/seed pods.
function = for pollination and contain seeds for dispersal.

Question 17

What is the organ system and function of the following organs:

• stems.
• leaves.
• vascular bundle.

Answer 17

organ system = shoot system.
function = to support the plant, to do photosynthesis, and to transport water, sucrose, etc.