Nervous
What is a neuron?
Neurons are information messengers
The epidermis.
What is the top layer of the skin called?
Name one bone in the skeletal system?
ribs, arms, legs, cranium, pelvis, humerus, femur, tibia, fibula, and more
how does the muscular system help us with our everyday lives?
It is responsible for the movement of the body which is an everyday thing
What are 2 causes of disease?
Genetics and pathogens.
What is the function of the nervous system?
growth and development
What are the 3 layers of the skin?
The epidermis, Dermis,and Hypodermis.
What are some functions of the skeletal system?
support, protection, movement, blood cell formation
what happens when you move your body?
muscles contract
What are antigens?
Antigens are markers on the pathogen that recognize them as invaders.
When does the nervous system begin to form?
at 6 weeks it begins to form
What is the structure of the dermal layer?
widely dispersed cells, highly vascular.
a connective tissue that connects bone to bone
What is a ligament?
when does the muscular system develop?
it develops around the 4th week
What is the main function of the immune system?
To defend the body against infection
What happens if you break your spinal cord?
You would become paralyzed because neurons wont be able to go past the spinal cord.
What is the purpose of the integumentary system?
to protect the muscles and organs while regulating the body tempatures.
What are some things stored in the bone?
calcium, fat, phosporous
when does the muscular system fully develop?
Only at approximately 20 years of age are when the epiphyses and diaphysis fuse, indicating that skeletal growth is complete.
What are some structures of the immune system?
immune cells, antibodies, chemicals
When does the nervous system fully develop?
around the age of 25
What happens to cells as they are pushed to the suface?
the farther cells move, the poorer their nutrient supply becomes and they die.
what structures make up the skeletal system?
Bones, joints, cartilage, and ligaments
what is the muscular system composed of?
it is composed of specialized cells called muscle fibers.
How does mucus participate in defending the body?
Mucus is the first line of defense in fighting infection.