1 / 13

Understanding Muscle Types and Functions

Discover the three types of muscles in the human body - smooth, cardiac, and skeletal - and how they enable movement, regulate blood flow, and facilitate bodily functions. Learn about muscle fibers, sarcomeres, and the process of muscle contraction and relaxation.

vdreher
Download Presentation

Understanding Muscle Types and Functions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. KEY CONCEPT Muscles are tissues that can contract, enabling movement.

  2. Humans have three types of muscle. • The muscular system moves substances throughout the body. • bones of the skeletal system • food through digestive system • blood through circulatory system • fluids through excretory system

  3. SMOOTH MUSCLE CARDIAC MUSCLE SKELETAL MUSCLE • skeletal muscle • There are three types of muscle tissue. • smooth muscle • cardiac muscle

  4. SKELETAL MUSCLE • Tendons connect muscle to bone. • Skeletal muscles are mostly voluntary. • Skeletal muscle attaches to the skeleton by tendons.

  5. Smooth muscle around this artery allows the artery to regulate blood flow by shrinking and expanding. SMOOTH MUSCLE • Smooth muscle lines organs and is involuntary. • move food through digestive organs • empty liquid from the bladder • control width of blood vessels

  6. CARDIAC MUSCLE • Cardiac muscle is found only in the heart. • pumps blood throughout body • controlled by pacemaker • contains more mitochondria than skeletal muscle cells

  7. muscle fiber muscle Muscles contract when the nervous systems causes muscle filaments to move. • Muscle fibers are cells of the muscular system.

  8. myofibril muscle fiber muscle • Myofibrils are long strands of protein in the muscle fiber.

  9. muscle fiber muscle myofibril sarcomere • Sarcomeres contain filaments that cause contraction. • Each myofibril is divided into sarcomeres.

  10. neuromuscular junction neuron MUSCLE • Neuron stimulates muscle at the neuromuscular junction.

  11. RELAXATION myosin Z line M line CONTRACTION • Sarcomeres contain filaments that cause contraction. • Each myofibril is divided into sarcomeres. • Actin filaments are pulled during contraction. • Myosin filaments pull actin during contraction.

  12. regulatory protein actin myosin Z line • Neurotransmitters cause calcium channels in the sarcomere to open. • Neuron stimulates muscle at the neuromuscular junction. • Calcium exposes binding sites. • Myosin binds to actin and pulls it. • As the sarcomere shortens, the muscle contracts.

More Related