Human Body part 1 💀 Flashcards
What is DNA?
A complex molecule that contains all of the information necessary to build and maintain an organism.
What are chromosomes?
It is what is stored in the neclues of a cell in packages.
What are genes?
Genes are in your DNA and they tell cells how to make a particular protein.
What is a tissue in the human body
Tissue is a group of cells that have a similar structure and that function together as a unit.
What are the 3 main types of muscles?
- cardiac muscle: which is in the heart
- smooth muscle: which can be found in the stomach and the guts
- skeletal muscle: in among your bones
What do Flexor muscles do?
close joints- as when you bend your knees
What do Sphincter muscles do?
squeeze shut- there is one at the top of your stomach to keep your stomach contents from coming back out of you, it opens when you throw up.
What do extensor muscles do?
open joints- as when you straighten your arm.
What do Levator muscles do?
lift up your body parts- as when you open your eye your eyelid goes up.
What do Depressor muscles do?
lower bits of the body- as when you frown
What are tendons and ligaments?
They are both tough connective tissues
What do tendons connect?
Tendons connect muscle to bone
What do ligaments connect?
Ligaments connect bone to bone
What is a cartilage?
Cartilage is a strong, flexible connective tissue that protects joints and bones.
What are arteries?
Arteries are tubelike structures responsible for transporting fluid (e.g. blood)
The three neves that go up your hand are called the:
- Radial nerve
- Median nerve
- Ulnar nerve
What is the largest organ
Your skin
Your skin has 3 layers
a) dermis
b) epidermis
c) hypodermis
What is a pore?
It is a little hole in which sweat travels up and out through.
How many chromosomes do cells contain?
46 chromosomes
