Cells, Tissues And Organs

Question 1

What are specialised cells?

Answer 1

Cells which contain structures which let them carry out a specific job within the organism.

Question 2

Function of red blood cell

Answer 2

Caries oxygen around the body

Contain the protein haemoglobin which binds the oxygen to the red blood cell

Question 3

Function of sperm cell

Answer 3

Carries genetic information to the egg

They have a tail which allows them to swim to met the egg cell

Question 4

Function of palisade mesophyll

Answer 4

Carries out photosynthesis in leaves

The cells have many chloroplasts so they can absorb more light

Question 5

Function of root cell

Answer 5

Absorption of water from the soil

Have small extensions from their surface called root hairs which increases surface area to allow more water to be absorbed

Question 6

What is a tissue?

Answer 6

A group of cells of the same type that work together to carry out a specific function

Question 7

What is an organ?

Answer 7

A group of tissues which act together to carry out a particular function

Question 8

Heart tissues and functions

Answer 8

Pumps blood around the body

Cardiac muscle - contracts to pump blood

Nervous tissue - controls speed heart beats

Connective tissue - forms valves preventing blood flowing backwards

Question 9

Leaf functions and tissues

Answer 9

Main area of a plant for photosynthesis

Palisade mesophyll - main tissue for photosynthesis

Spongy mesophyll - absorbs carbon dioxide from air for photosynthesis

Guard cells - open and closes pores called stomata in lower epidermis to control water loss

Question 10

Why do multicellular organisms have many different types of cells?

Answer 10

Because the cells are adapted to carry out many different processes required to keep the organism alive