6.1
98% of the biochemicals that make up living things are just 4 elements combined. These four elements are?
Carbon, Hydrogen, Nitrogen, and Oxygen
What is an artery?
Blood vessel that carry blood away from heart to the body.
What is the main function of digestive system?
To break down food into nutrients so that the body can absorb and use for energy.
What is the main organ of the respiratory system?
Lungs
Bones grow in 2 ways. How?
1. Thicker and 2. Longer
Basic unit of all living thing is?
Cell
What does the word "cardio"and "vascular" mean in Greek?
Cardio = heart
Vascular = vessel
Digestive system happens in 2 ways, physically and chemically.
How does it happen?
1. Physically: By chewing physically with your teeth
2. Chemically: By using enzymes and acids.
What is the main function of respiratory system?
Bring in oxygen and remove carbon dioxide from the body.
Bone's core is composed of a material called ___________. There are two types of this. What is this?
Marrow. Red bone marrow and yellow bone marrow
What is a tissue?
State the 4 components of the blood and the function of each.
Red blood cell: carry oxygen
White blood cell: fight infections
Platelets: help clot blood
Plasma: yellowish liquid that carries nutrients
What is the stomach's main function?
To church the food and use enzyme to break down so that it digests.
Why do we need oxygen? Explain.
Because we need energy and oxygen is needed to create energy in our body using cellular respiration.
How does exercise affect muscles?
When you exercise, the size of muscle cells change.
State one type of body system that we did NOT learn this unit!
Endocrine, Nervous, Immune, Urinary, etc.
State the two function of cardiovascular system
1. Carry oxygen and nutrients to different parts of the body
2. Pick up waste products from the cells
What does the small intestine do?
Small intestine breaks down and the nutrients from the food passes through the walls of the small intestine. Nutrients soak into the bloodstream.
Explain the process of Gas Exchange.
Gas exchange is when oxygen and carbon dioxide gets exchanged inside the alveoli. Oxygen travels from lungs to the blood and CO2 travels from blood to the lungs.
What are the 3 types of muscle called? State the function of each muscle.
Skeletal muscle: attached in the bone
Soft muscle: muscle that reacts slowly
Cardiac muscle: only found in the heart
What is a share common feature of cells?
What is the tiniest blood vessel called?
Capillaries
This is the major component of a person's digestive system, which are series of tubes and body organs. What is this?
Gastrointestinal tract
What is the organ that works as a windpipe and carries air to the lungs called?
Trachea
State the 5 functions of skeletal system
1. Protection
2. Movement
3. Support
4. Produce blood cells
5. Store minerals