• Two main types will be considered.
• These are exoskeleton and endoskeleton.
1. Exoskeleton
• Exoskeleton is hard outer covering of arthropods made up of mainly chitin.
• Which is secreted by epidermal cells and hardens on secretion.
• It is strengthened by addition of other substances e.g. tannins and proteins to become hard and rigid.
• On the joints such as those in the legs the exoskeleton is thin and flexible to allow for movement.
-Functions of Exoskeleton
• Provide support.
• Attachment of muscles for movement.
• Protection of delicate organs and tissues.
• Prevention of water loss.
2. Endoskeleton:
• It forms an internal body framework.
• This is a type of skeleton characteristic of all vertebrates.
• The endoskeleton is made of cartilage, bone or both.
• It is made up of living tissues and grows steadily as animal grows.
• Muscles are attached on the skeleton.
• The muscles are connected to bones by ligaments.
-Functions
• The functions of endoskeleton include support, protection and movement.
• Locomotion in a finned fish e.g. tilapia.
• Most of the fishes are streamlined and have backward directed fins to reduce resistance due to water.
Wilfykil answered the question on February 28, 2019 at 12:41
- State the role of support tissues in young and old plants(Solved)
State the role of support tissues in young and old plants
Date posted: February 28, 2019. Answers (1)
- Name the defects of the ear(Solved)
Name the defects of the ear.
Date posted: February 28, 2019. Answers (1)
- List the effects of hard drugs on human health(Solved)
List the effects of hard drugs on human health
Date posted: February 28, 2019. Answers (1)
- What are the similarities between endocrine and nervous system?(Solved)
What are the similarities between endocrine and nervous system?
Date posted: February 28, 2019. Answers (1)
- Write brief notes on Thyroxine(Solved)
Write brief notes on Thyroxine
Date posted: February 28, 2019. Answers (1)
- State the Hormones produced in humans and their effects on the body.(Solved)
State the Hormones produced in humans and their effects on the body.
Date posted: February 28, 2019. Answers (1)
- Give the Components of the nervous system in humans(Solved)
Give the Components of the nervous system in humans
Date posted: February 28, 2019. Answers (1)
- Define the following:
1. Phototaxis
2. Osmotaxis
3. Chemotaxis(Solved)
Define the following:
1. Phototaxis
2. Osmotaxis
3. Chemotaxis
Date posted: February 28, 2019. Answers (1)
- Define the following terms as used in Genetics:
(Solved)
Define the following terms as used in Genetics:
1. Genotype
2. Phenotype
3. Alleles
4. Homozygous
5. Heterozygous
6. Hybrid
7. Hybrid vigour or Heterosis
Date posted: February 28, 2019. Answers (1)
- What are the Components of DNA?(Solved)
What are the Components of DNA?
Date posted: February 28, 2019. Answers (1)
- What are the Properties of Chromosomes?(Solved)
What are the Properties of Chromosomes?
Date posted: February 28, 2019. Answers (1)
- What is Genetic Engineering?(Solved)
What is Genetic Engineering?
Date posted: February 28, 2019. Answers (1)
- Define the term "Gene therapy"(Solved)
Define the term "Gene therapy"
Date posted: February 28, 2019. Answers (1)
- Define the term "cloning"(Solved)
Define the term "cloning"
Date posted: February 28, 2019. Answers (1)
- Discuss baculoviruses as bio control agents(Solved)
Discuss baculoviruses as bio control agents
Date posted: February 25, 2019. Answers (1)
- Describe how the human kidneys are structurally adapted to perform their functions.(Solved)
Describe how the human kidneys are structurally adapted to perform their functions.
Date posted: February 24, 2019. Answers (1)
- (a)(i)Explain why skeletal muscles are said to be antagonistic.
(ii)State two characteristics of skeletal muscles.
(b)State the role of flexor muscle in movement.
(Solved)
(a)(i)Explain why skeletal muscles are said to be antagonistic.
(ii)State two characteristics of skeletal muscles.
(b)State the role of flexor muscle in movement.
Date posted: February 24, 2019. Answers (1)
- How are the following structures of a leaf adapted to their functions:
(i)Petiole?
(ii)Veins?
(iii)Palisade mesophyll?
(iv)Guard cells?(Solved)
How are the following structures of a leaf adapted to their functions:
(i)Petiole?
(ii)Veins?
(iii)Palisade mesophyll?
(iv)Guard cells?
Date posted: February 24, 2019. Answers (1)
- What are the stages of pathogenesis of diseases?(Solved)
What are the stages of pathogenesis of diseases?
Date posted: February 23, 2019. Answers (1)
- State the 2 types of micro organism and give their features.(Solved)
State the 2 types of micro organism and give their features.
Date posted: February 23, 2019. Answers (1)