Body Systems Flashcards
Organ system
Lots of organs working together to perform a function such as breathing.
Organ
An organ is a group of tissues to perform a function.
Hierarchy of an organism
Cell Tissue Organ Organ system Organism
Antagonistic muscle pairs
Antagonistic muscle pairs are muscles that work opposite each other to make a bone move. When one contracts the other relaxes.
Ligament
Ligament connects bone to bone.
The skeletal system
The skeletal system is your skeleton.
Tendon
Tendons connect muscle to bone.
Bone marrow
The bone marrow is the inside bit of the bone. It makes our blood.
Cartilage
Cartilage is a smooth surface at the end of the bone which acts as a shock absorber. It reduces friction between bones so the bones don’t where down.
Joint
A joint is where two or more bones meet.
Trachea
The inhaled and exhaled air goes down the trachea which leads to the bronchi.
Synovial fluid
Synovial fluid (like cartilage) reduces friction around the bone. Synovial fluid allows us to move in a more freely way than if we didn’t have it.
Bones of the lower leg
Small bone is called the fibula and the big one is the tibia.
Inhalation
Inhalation is when we take a breath in.
Cell
The cell is the smallest functional unit in an organism.
Exhalation
Exhalation is when we breathe out.
Bones of the arm
The upper arm is called the humorous. The lower bones are called the ulna (the one closest to the little finger) and the radius (the one closest to the thumb).
Your spine
Your spine consists of lots of different vertebra.
Diaphragm
The diaphragm separates the lower and upper part of the body. It goes up when you inhale and down when you exhale.
Bone
Part of the skeletal system which supports our body. Without our skeleton we wouldn’t be able to move as the muscle will have nothing to attach to.
Tissue
A set of similar cells to perform a function.
Sternum
The sternum is the breastbone. It is the hard bone at the front and middle of your ribs.
Bone of the upper leg
The bone of the upper leg is the femur.
