The Human Body
What is the basic unit of life?
A cell.
What cells in the body protect against harmful invaders like bacteria and viruses?`
White blood cells
What is the control center of the cell?
The nucleus
After food enters the mouth, where does it go next?
In the esophagus.
What two gases are exchanged in the respiratory system?
Oxygen and carbon dioxide
Name two examples of organs in the body.
Hearts, Lungs, Brain, Eyes etc.
What cells carry oxygen throughout the body?
Red blood cells
What surrounds the cell and controls what comes in and out?
Cell membrane
Where are nutrients from food absorbed into the blood?
In the small intestine.
Name the two main tubes that carry air into the lungs.
The bronchi.
What do cells form when they join together?
Tissue
What cells allow muscles to contract and help in movement?
Muscle cells
What is the jelly-like substance inside the cell?
Cytoplasm
What happens to food in the stomach during digestion?
The food is mixed with digestive juices and turned into a liquid.
What do red blood cells do in the respiratory system?
Carry oxygen to the body and bring back carbon dioxide.
What do tissues form when they join together
Organs
What cells are part of your nervous system and help transmit signals in the body?
Nerve cells or Neurons
What does the mitochondria do?
Provide energy for the cell.
What does the large intestine do?
Absorb water and form solid waste.
What are the tiny air sacs in the lungs called?
Alveoli.
What is the order of organization in the body, starting from the smallest to the largest?
Cells → Tissues → Organs → Systems
What cells are found in your skin and help protect your body by forming a barrier?
Skin cells
What do ribosomes make in the cell?
They make protein.
Which organ makes bile and which organ stores bile?
The Liver makes bile and the Gallbladder stores bile.
Which muscle moves up and down to help air flow in and out of the body.
The diaphragm.