Cell Activity. Contents. Plant Cells vs. Animal Cells Specialised Cells Specialised Animal Cells Cells, Tissues, Organs and Systems Diffusion & Osmosis Partially Permeable Membrane Mitosis Meiosis Mitosis vs. Meiosis. Plant cells, Animal cells. Only plant cells have these: Cell wall
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Root hair cell in PLANTS:
The sperm cell is an example of a specialised ANIMAL cell:
Red Blood Cell - Carries oxygen around the body
Adaptations - No nucleus, large surface area, so maximum area for oxygen carriers: haemoglobin
White Blood Cell – Fight disease, some make antibodies
Adaptations - Irregular shape, they can change shape to squeeze out of blood vessels and get to the site of infection.
Others have cytoplasm which can flow making it possible for the cell to change shape, surround and engulf bacteria.
Can increase in numbers to fight disease.
All living things are made up of cells…
A group of CELLS e.g. Heart Muscle makes up a TISSUE
e.g. Heart Muscle Tissue
A group of TISSUES makes up an ORGAN
A group of ORGANS makes up a SYSTEM
e.g. Circulatory System
A group of SYSTEMS make up an ORGANISM
Small molecules, such as water can pass through the small holes in the membrane…
But larger molecules like sugar cannot pass through the membrane.
Mitosis and meiosis are the two types of cell division.
Mitosis enables growth and repair to occur.
Meiosis is for the production of sex cells.
Mitosis is a process of cell division which results in the production of two daughter cells from a single parent cell. The daughter cells are identical to one another and to the original parent cell.Mitosis (Asexual)
Each chromosome replicates
Meiosis is thetype of cell division by which germ cells (eggs and sperm) are producedMeiosis (Sexual)
e.g. root hair cell, red blood cell