Biology Organisms Flashcards
Multi-cellular organisms are made up of many…
Cells
State the first level of organisation in a multi-cellular organism.
Cells
State the second level of organisation in a multi-cellular organism.
Tissue.
State one example of an animal tissue.
Muscle tissue.
Nervous tissue.
State one example of a plant tissue.
Xylem - tubes that carry water around the plant.
State the third level of organisation in a multi-cellular organism.
An organ.
An organ is made up of groups of different tissues that work together to perform a certain function.
State some examples of an organ.
Brain
Heart
Lungs
Stomach
Liver
Bladder
Kidney
Intestines
State the fourth level of organisation in a multi-cellular organism.
An organ system.
The circulatory system…
Transports substances around the body in the blood.
The respiratory system…
Takes in oxygen and removes carbon dioxide from the blood.
The reproductive system…
Produces sperm and egg cells for the production of new organisms, also where the foetus develops.
The digestive system…
Breaks down and then absorbs food molecules.
Muscular skeletal system…
Supports the body and causes movement by muscles and bones working together.
The immune system…
Protects the body against infections.
State two examples of an organ system.
Circulatory system.
Respiratory.
Reproductive.
Digestive.
Muscular skeletal.
Immune.
State the fifth level of organisation in a multi-cellular organism.
A Multi-cellular organism.
State the main organs in plants.
Leaf - absorbs sunlight for making food during photosynthesis.
Stem - holds the plant upright.
Root - anchors the plant into the ground and takes up water and minerals from the soil.
In multi-cellular organisms, substances such as……….. and ………. must be transported to the internal cells within the organism.
Glucose and Oxygen.
Describe the hierarchy of organisation in the human body, starting with the least complex.
Cells.
Tissues.
Organs.
Organ systems.
Organism.
What are bones?
Bone is a living tissue with a blood supply. It is growing and changing all the time and can repair itself when damaged.
What is a skeleton?
All the bones in your body make up your skeleton. They are joined together to form a network.
How many bones are there in the average adult skeleton?
206
The skeleton is part of the …….. ……….. system.
Muscular skeletal.
State the 4 functions of the skeleton.
1) Support the body
2) Protect vital organs
3) Help the body move
4) Make blood cells
Name the tissue that causes your skeleton to move.
Muscle.
Name the tissue inside the bone that produces red and white blood cells.
Bone marrow.
Red blood cells are needed to…
Carry oxygen around the body.
White blood cells are used to….
Protect against infection.
Describe the three parts of the structure of the bone.
1) Compact bone (rigid outer structure)
2) Spongy bone inside
3) Bone marrow
What are joints?
Joints occure where two or more bones join together. Most joints are flexible. However, some bones in the skeleton are joined rigidly together and cannot move.
How do joints allow you to move?
Joints need to be strong enough to hold your bones together but flexible enough to let them move. Different types of joints allow movement in different ways.
Name two types of hinge joint.
Knee and elbow
Name two examples of ball and socket joints.
Hip and shoulder
Name a fixed joint.
The skull
What is cartilage?
A strong, smooth tissue that covers the ends of bones. It is kept slippery by fluid in the joint.
What is a ligament?
It connects bones in joints.