different kinds of cells
- Created by: GraceYoung
- Created on: 21-08-18 13:09
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- different kinds of cells
- bacterial cell
- a single line of chromosomalDNA lies free in the cytoplasm. this carries most of the bacterial genes.
- cell membrane
- some bacteria have a flagellum to help them move.
- many bacteria have a cell wall for protection, but it is made of different substances to plant cell walls.
- some bacteria have extra circles of DNA called plasmid DNA. Plasmids contain additional genes that are not found in chromosomes.
- ribosomes are tiny structures that make proteins
- sperm cell
- the head contains the genetic material for fertilisation of a haploid nucleus.
- the acrosome in the head contains enzymes so that the sperm can penetrate an egg.
- The middle piece is packed with mitochondria to release energy needed to swim and fertilise the egg.
- The tail enables the sperm to swim.
- Sperm are the smallest cells in the body and millions of them are made.
- egg cell
- The cytoplasm contains nutrients for the growth of the early embryo.
- The haploid nucleus contains the genetic material for fertilisation.
- The cell membrane changes after fertilisation by a single sperm so that no more sperm can enter.
- Eggs are one of the biggest cells in the body and only a few are made.
- Ciliated epithelial cel
- Cilia on the surface beat to move fluids and particles up the trachea.
- bacterial cell
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