Cells Tissues and Organ Mindmap
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?- Created by: Jonathen
- Created on: 29-03-13 14:41
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- Cells Tissues and Organisms.
- Animal and Plant cells.
- Nucleus- controls cell activities.
- Cytoplasm- Jelly like substance where chemircal reactions take palce
- Mitochondria is where energy is released during aerobic respiration.
- Cell Membrane- Controls the movement of what enters and leaves the cell.
- Bacteria and Yeast
- Bacteria are very small and can only be seen with a microscope
- Bacterial cells have a cell membrane and a cell wall which surrounds cytoplasm.
- Bacteria do not have a nucleus so the genetic material is in the cytoplasm.
- Yeast is a single celled organism they have a nucleus cytoplasm and membrane surrounded by a cell wall
- Specialised Cells
- As an organism matures each cell develops into a particular type.
- If a cell has many mitochondria it must need a lot of energy muscle cell sperm cell.
- If a cell has many Ribosomes it is making a lot of protein gland cells.
- Neurons are specialised to carry impulses from receptors to the CNS.
- Diffusion
- Spreading out of particles from areas of high concentration to low concentration
- The difference in between the two areas is called a concentration gradient
- Examples: Diffusion of oxygen into cells of the body, from the blood stream as the cells are respiring.
- Tissues and Orgnas
- Muscle Tissue- contracts and brings about movement
- Glandular Tissue- produces substances such as enzymes and hormones.
- Epithelial Tissue- Covers some parts of the body
- In plants there are xylem and phloem which transport minerals.
- Animal and Plant cells.
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