B2 - Cells

Describe :

A root hair cell.

Tiny hair-like structures which increase surface area of the cell.

Describe:

Ovum (egg cell)

Large cell which can carry massive food reserves for the develeping embryo.

Describe:

Xylem

Long, thin, hollow cells used to transport water through the stem and root.

Describe:

White Blood Cells

Can change shape in order to engulf and destroy invading microorganisms.

Describe:

Sperm cell.

Has a tail which allows it to move.

Describe:

Palisade cells

Packed with chloroplasts for photosynthesis.

Describe:

Red Blood Cells

No nucleus, so packed full of haemoglobin.

Describe:

Nerve cells.

Long, slender axons which can carry nerve impulses.

Human cells, most animal cells, and plant cells have what parts?

• Nucleus
• Cytoplasm
• Cell membrane
• Mitochondria
• Ribisomes

Describe:

A nucleus

A nucleus controls the activities of the cell.

Describe:

Cytoplasm

A cytoplasm is where most chemical reactions take place.

Describe:

Mitochondria

Mitochondria is where most of the energy is released in respiration.

Describe:

A cell membrane

A cell membrane controls the passage of substances in and out of the cell.

Describe:

Ribosomes

Ribosomes are where protein synthesis occurs.

Plant cells have three extra parts what are they?

• A cell wall
• Chloroplasts
• A permanent vacuole

Describe:

A cell wall

A cell wall is used to strengthen the cells.

Describe:

Chloroplasts

Describe:

A permanent vacuole

A permanent vacuole is filled with cell sap.