HUMAN SYSTEM
1) Identify organ systems and state their functions in human
- Digestive: Breaks down food into simpler substances, and absorb these substances so that they can be used by the body
- Respiratory: Takes in air into the bod. Removes air from the body.
- Circulatory: Carries digested food, water and oxygen to all parts of the body. Carries waste materials away from different parts of the body.
- Skeletal: Supports the body. Gives the body shape. Protects the organs.
- Muscular: Helps different part of the body to move.
The integration of the different systems is important for carrying out life processes
2) Identify organs in the human digestive system and describe their functions
- mouth
- gullet
- stomach
- small intestine
- large intestine
3) What is air made up of
- a mixture of gases such as nitrogen, carbon dioxide, oxygen and water vapour.
4) Identify organs of the human respiratory and circulatory system and describe their functions
Respiratory System
Circulatory System
- Nose: allows air to enter or leave the body.
- Windpipe: transports air to and from the lungs.
- Lungs: help the body to take in oxygen and remove carbon dioxide.
Circulatory System
- Heart: pumps blood to all body parts.
- Blood vessels: transports blood to all body parts.
- Blood: transports oxygen, digested food and water to all parts of the body. Transport carbon dioxide and other waste material from all different parts of the body for removal.
5) Compare how plants, fish and humans take in oxygen and give out carbon dioxide
- Fish: take in oxygen and remove carbon dioxide through their gills.
- Plants: take in carbon dioxide and give out oxygen during photosynthesis. Take in oxygen and give out carbon dioxide during respiration.
- Human: take in oxygen and give out carbon dioxide during respiration.
6) Compare the ways in which substances are transported within plants and humans
- Plants: tubes that transport food (from leaves to other parts of the plant) and water (from roots to other parts of the plant).
- Humans: blood vessels that transport digested food, oxygen and carbon dioxide
PLANT SYSTEM
7) Identify the different parts of plants and state their functions
- Leaf: collect energy from the Sun and make food for the plant through photosynthesis.
- Stem: supports the plant. Carries water and minerals to the leaf.
- Root: absorb water and minerals from the soil. Anchors the plant in the ground.
8) Identify parts of the plant transport system and describe their functions
- Water carrying tubes: carry water and mineral salts from the roots to other parts of the plant.
- Food carrying tubes: carry food from the leaves to other parts of the plant.
CELL SYSTEM
- A cell is a basic unit of life
9) Identify different parts of a typical plant cell and animal cell and relate the parts to the functions
Plant cell
Animal cell
- Cell wall
- Cell membrane
- Cytoplasm
- Nucleus
- Chloroplasts
Animal cell
- Cell membrane
- Cytoplasm
- Nucleus
10) Compare a typical plant and animal cell
- Animal cell has nucleus, cell membrane and cytoplasm. But no chloroplast and cell wall.
ELECTRICAL SYSTEM
11) Electric circuit
- consist of an every source (battery) and other circuit components (wire, bulb, switch) forms an electrical system
- current can only flow in a closed circuit
12) Identify electrical conductors and insulators
- Electrical conductors allow electric current to pass through them eg. metals.
- Electrical insulators do not allow electric current to pass through them eg. plastic, rubber.
13) Effects of some variables on the current in a circuit
- Bulbs arranged in series: only one pathway that electricity can flow through the bulbs.
- Bulbs arranged in parallel: more than one pathway that electricity can flow through the bulbs.
