Specialized Cells - Biology

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  • Created by: Sophie
  • Created on: 23-10-12 14:44

Sperm Cell

SPERM CELL 

  • Function : To carry male genetic information to the ovum and cause fertilization. 
  • Only contains half DNA information so that fusion between the gametes creates a full set of chromosomes. 

Structure:

  • Tail : allows faster movement and is streamline. 
  • Nucleus : contains male's genetic information. 
  • Lots of Mitochondria : provides extra energy so sperm can swim faster. 
  • Acrosome (head) : to dissolve the egg cell, and allows the egg and sperm cell to fuse. 
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Egg Cell

EGG CELL 

  • Function : Hold mothers genetic information and once fertilized divides ad dives to from a baby. 
  • Largest cell in the body.

Structure:

  • Size : Contains lots of cytoplasm - food store to provide energy and food for growing embryo. 
  • Nucleus : contains female's genetic information. 
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Ciliated Epithelial

CILIATED EPITHELIAL CELL 

  • Function : To move liquids or small particles. 
  • They are found in the wind pipe and lungs.  Mucus in the air passages traps dirt and bacteria.  Cilia moves the mucus to the back of the throat.

Structure:

  • Many Cilia : Cilia beat together to move the liquid or particles. 
  • Lots of Mitochondria : energy is needed to keep the cilia beating.  
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Red Blood Cell

RED BLOOD CELL 

  • Function : To transport oxygen around the body.

Structure:

  • Full of Haemoglobin : It binds to oxygen allowing the oxygen to be transported. 
  • No Nucleus : More room for haemoglobin - more oxygen. 
  • Bi-Concave : Larger surface area, oxygen can diffuse (move in and out) of the cell faster. 
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Muscle Cell

MUSCLE CELL 

  • Function : To contract and cause movement in the body. 
  • Works antagonist - in pairs. 

Structure:

  • Lots of Mitochondria : Allows more (aerobic) respiration so more energy can be used for contraction. 
  • Protein Filaments :  They pull together, making the cell shorter and therefore making the muscle shorter - contracting. 
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