Science Flashcards
What are red blood cells?
Red blood cells are responsible for carrying oxygen and carbon dioxide around the body.
What is the purpose of the circulatory system?
The circulatory acts as a transport system for blood, in which oxygen and nutrients reach the bodies cells, and wasted materials are carried away.
Where do red blood cells collect oxygen, for it to be sent around the body?
The red blood cells collect the oxygen from the lungs.
What is the function of white blood cells?
White blood cells help the body fight off germs.
How do white cells defend the body?
As soon as germs enter the body, white blood cells attack and destroy the germs.
What happens when you have an infection?
When your body gets an infection, the body will produce more blood cells to help fight off the infection.
What are platelets?
Platelets are blood cells that help to stop bleeding.
What do platelets do to protect the human body once we have injured ourselves?
When we hurt (e.g cut) ourselves, we break a blood vessel and the blood leaks out. And to stop blood leaking from the opening in our body, platelets start to stack to the opening of the damaged blood vessel.
Name the bones of the skeleton.
- Cranium
- Clavicle
- Scapula
- Humorous
- Sternum
- Rib Cage
- Vertebrae
- Radius
- Ulna
- Carpals
- Metacarpals
- Phalanges
- Pelvis
- Femur
- Patella
- Tibia
- Fibula
- Tarsals
- Metatarsals
- Phalanges
What is mechanical digestion?
Mechanical digestion is the form of digestion through chewing (in the mouth) and churning (in the stomach).
What is chemical digestion?
Digestion through the help of enzymes, into substances that cells can absorb.
What is the skeleton?
An internal or external framework of bone, cartilage or other rigid material supporting or containing the body of an animal or plant.
How many bones does a human have?
A baby has 270. An adult has 206.
What are the three classifications of joints?
Fibrous (immovable) E.G think teeth
Catillagenous
Why is the digestive system important?
Digestion is important for breaking down food into nutrients, which the body can then use for energy, growth and cell repair.
Describe how digestion works?
Digestion starts by chewing the food in your mouth in your teeth, which breaks down the starches in the food with the help of saliva. You then swallow your food which goes down the esophagus. Once your food reaches your stomach the upper muscles in your stomach relaxes to allow the food to enter, then with the help of stomach acid, your lower stomach mixes the food to break down proteins.
What kinds of energy are there?
Light Energy Heat Energy Electrical Energy Potential Energy Elastic Potential Energy Gravitational Potential Energy Chemical Potential Energy Nuclear Energy Kinetic Energy Sound Energy
What is energy efficiency?
Energy efficiency is a measure of how much energy is transformed into the desired energy type, compared with the amount that might be a by-product and lost as heat, sound or other types of energy.
Why is energy efficiency important to consider?
Energy efficiency is important to consider because it lets us know what energy is being used and what energy we use, ends up getting wasted.
