1. The Muscular System Main function is to provide movement
works with skeletal system to provide voluntary movement
helps to circulate blood
move food through digestive system

2. The three types of muscle:
Skeletal muscle - voluntary muscle, is found throughout the body, attached to bones, striated (striped appearance), many nuclei.
Smooth muscle – usually involuntary, surround stomach, blood vessels and intestines. Smooth muscles move food through digestive tract, control the flow of blood, change size of pupils in the eyes to adjust to light. No stripes in appearance and one nucleus.
Cardiac muscle – only in the heart, involuntary, striated like skeletal, one nucleus like smooth muscles.

3. Running, walking, swimming, dancing, lifting, sitting.
Voluntary
Movement we choose to do.
Running, walking, swimming, dancing, lifting, sitting.

4. Digesting food, heart beating,
Involuntary
Automatic Movement
Digesting food, heart beating,
breathing, blinking

5. The Skeletal System Supports the body Protects internal organs
Provides movement
Stores mineral reserves
Provides a site for blood cell formation

6. Joints
where two or more bones meet, most allow movement but some are fixed

7. 4 types of Freely Movable Joints
Hinge Joint
allow back and forth movement (like a door hinge)
In elbows, knees, fingers, toes

8. Ball-and-socket Joint
allow rotational movements
in hips, shoulders

9. allow bones to twist against each other Between neck vertebrate - head
Pivot Joint
allow bones to twist against each other
Between neck vertebrate
- head

10. allow bones to slide against each other In wrists & ankles
Saddle/Gliding Joint
allow bones to slide against each other
In wrists & ankles

11. Bones Made of living cells, mainly calcium
Compact Bone – hard bone surrounds entire bone
Spongy Bone – inside compact bone, less dense,
filled w/many holes
Bone marrow – Center cavity 11

12. 2 types of Bone Marrow
Red bone marrow – produces red blood cells, white blood cells, & platelets
Yellow bone marrow – consists of fat, which stores energy, found in hollow interior of long bones 12

13. Development of Bones
Cartilage - skeleton of an embryo (fetus) is composed of this type of connective tissue
Cartilage is replaced by bone in the process of ossification
In late teens/early 20s, cartilage growth plates replaced by bone 13

14. Ligament – a tough band of connective tissue; connects bones to bones
Tendons – thick bands of connective tissue; attach muscles to bones
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15. Skeletal System Notes Function of the Skeletal System:
Supports the body
Protects internal organs
Provides movement
Stores mineral reserves
Provides a site for blood cell formation
Bones Made of living cells, mainly calcium.
Compact Bone – hard bone surrounds entire bone
Spongy Bone – inside compact bone, less dense, filled w/many holes
Bone marrow – Center cavity, where blood cells are made and some nutrients are stored
Cartilage – a flexible tissue that gives support and protection but is not rigid like bones.