Lecture 21: Movement and Tissue Types

Connective Tissue

Tissue that supports, binds, or separates other tissues or organs.

Muscle Tissue Types

Cardiac, skeletal, and smooth.

Hydrostatic Skeleton

Uses a fluid-filled cavity surrounded by muscles to enable movement.

Exoskeleton

External skeleton providing protection and structure.

Endoskeleton

Internal skeleton supporting soft tissues and organs.

Axial Skeleton

Skull, rib cage, and spinal column.

Appendicular Skeleton

Bones of arms, legs, and pelvis.

Osteocytes

Bone cells within compact bone.

Osteoblasts

Build new bone tissue.

Osteoclasts

Break down old and damaged bone tissue.

Bone Matrix

Mineral portion (calcium and phosphate) providing strength.

Compact Bone

Dense outer layer of bone.

Spongy Bone

Porous interior of bones.

Bone Marrow

Soft tissue inside bones responsible for storage and blood cell production.

Ligaments

Connect bones to other bones.

Tendons

Connect muscles to bones.

Synovial Sacs

Fluid-filled sacs reducing friction in joints.

Acetylcholine

Neurotransmitter that triggers muscle contraction.

Fast Muscle Fibers

Quick, powerful contractions.

Slow Muscle Fibers

Sustained, endurance contractions, rich in myoglobin.