Levels of Organization
List the levels of organization in the human body from simplest to most complex
Atom - Molecule - Cell - Tissue - Organ - Organ System - Organism
What is the job of the immune system?
Protection
What are the main parts of the cardiovascular system?
Heart, blood, and blood vessels.
What is the main function of the nervous system?
to send messages and process information throughout the body
What is the purpose of the reproductive system
to produce offspring
How are tissues and organs connected?
Tissues are groups of cells that form organs.
Name one nonspecific defense of the body.
Skin
Explain the role of red blood cells in the body
they transport oxygen to cells and carry carbon dioxide away
What is the largest part of the brain and what does it do?
Cerebrum controls thinking and movement.
what is fertilization
Sperm and egg joining to form a zygote.
What could happen if one organ system stops working?
The body could become very sick or stop functioning properly.
How are nonspecific and specific defenses different
Nonspecific = fights anything
Specific = fights certain germs and remembers them
Compare arteries, veins, and capillaries
Arteries carry blood away from the heart, veins carry blood back, and capillaries allow exchange of materials
Explain the role of the cerebellum
It controls balance and coordination
What is the job of the uterus during development?
It supports and protects the developing baby.
How are cells and tissues different?
Cells are basic units of life, tissues are groups of cells.
How do B cells and T cells help protect the body?
B cells produce antibodies to tag pathogens
T cells destroy infected cells
Why is blood circulation important?
It delivers oxygen and nutrients to cells and removes wastes
What does the medulla oblongata control?
controls breathing and heartbeat
What happens in the second trimester?
The fetus grows quickly and develops more features; fingerprints
Why do multicellular organisms need many levels of organization
Efficiency
What happens if the immune system attacks healthy cells?
it can cause an autoimmune disease.
What can high blood pressure cause over time?
Heart attack or stroke
How do brain parts work together when responding to something?
The brain processes information and coordinates a response.
Why is the blastocyst stage important?
Implantation