B3.1 Tissues and Organs

Question 1

Define a tissue.

Answer 1

A group of cells with similar structure and function working together.

Question 2

Define an organ.

Answer 2

A collection of tissues.

Question 3

Define an organ system.

Answer 3

A group of organs that all work together to perform specific functions.

Question 5

What are the levels of organisation in a large multicellular organism?

Answer 5

Cells
Tissues
Organs
Organ systems
Organism

Question 6

Give some examples of organ systems in the human body.

Answer 6

Digestive system, circulatory system, gas exchange system

Question 7

Name some adaptations in some of the organs which make them more effective as exchange surfaces.

Answer 7

Increased surface area
Rich blood supply to exchange areas
Short diffusion distances
Mechanisms to increase concentration gradients

Question 8

Is sperm a specialised cell, a tissue, or an organ? Explain why.

Answer 8

Specialised cell

It is a single cell

Question 9

Is a kidney a specialised cell, a tissue, or an organ? Explain why.

Answer 9

Organ

It is a collection of tissues which have a specific purpose / role.

Question 10

Is a stomach a specialised cell, a tissue, or an organ? Explain why.

Answer 10

Organ

It is a collection of tissues which digests food.

Question 11

How has the stomach adapted for its role (digestion of food)?

Answer 11

It has muscular tissue to church food and digestive juices together, glandular tissue to produce the digestive juices which break down the food, and epithelial tissue, which covers the inside and outside of the organ for structure. These speed up the process and are tailored to help the stomach digest food quickly and effectively.