Circulatory System Vocabulary Review The Living Environment - NYS 1.2 – The student should be able to describe and explain the structures and functions of the human body at different organizational levels (for example, systems, tissues, cells, organelles) Remember to wait for the vocabulary word to pop up! Can you guess it before it comes up?

Periosteum Tough layer of connective tissue surrounding a bone ?

Haversian canal One of a network of tubes running through compact bone that contains blood vessels and nerves ?

Bone Marrow Soft tissue inside cavities within bones. There are two types: yellow and red.

Cartilage Strong connective tissue that supports the body and is softer and more flexible than bone.

Ossification The process of bone formation during which cartilage is replaced by bone

Joint Place where one bone attaches to another

Ligament Strip of tough connective tissue in a joint that holds bones together ?

Myosin Protein that makes up the thick filaments in striations in skeletal muscles

Actin Protein that makes up the thin filaments in striations in skeletal muscles

Acetylcholine Neurotransmitter that diffuses across a synapse and produces an impulse in the cell membrane of a muscle cell ? ?

Tendon Tough connective tissue that joins skeletal muscles to bones

Epidermis The outer layer of the skin ?

Keratin A tough, fibrous protein found in the skin ?

Melanin Dark brown pigment found in the skin

Dermis Inner most layer of the skin ?

Hair Follicle Tube-like pocket of epidermal cells that extends into the dermis

The End!