Which way to the anatomy classroom?... This way… Muscle Tissue Which way to the anatomy classroom?... This way…

Introduction Lets be very honest… Many of the things that define us as humans and as individuals are based on muscular movements The ability to walk upright The ability to play sports The ability to play the saxophone The ability to talk a selfie

Introduction Here is an unconventional example My friend Jon is a professional eater The muscles that he uses defines what he does In fact we often talk about the different types of muscles that could help him in his competitions

Muscle Tissue Muscle tissue is designed to help movement of the body or in the body It is a diverse set of tissue that is specialized for contraction This contraction will pull on two anchored bases and will allow for movement

Muscle Tissue There are three main types of muscle tissue Skeletal Muscle Cardiac muscle Smooth Muscle These three different types of muscles are responsible for the entire movement system of the body

Skeletal Muscle Skeletal muscle is composed of large muscle cells that are designed to make strong contractions It is a significant amount of your body weight 42% in men 36% in women

Skeletal Muscle Skeletal muscle cells can be up to one foot in length Single muscle cells are often called muscle fibers Muscle fibers are often bundled with other muscle fibers to increase their strength and resistance to damage These bundles give your muscle a striped or striated appearance

Skeletal Muscle Skeletal muscles are controlled by the nervous system This means that for a skeletal muscle to contract a signal must come from a set of nerves Since you have a large amount of control over your nerves, you have a large amount of control over your muscle fibers This means most of your muscle movements come from striated voluntary muscle

Cardiac Muscle Tissue Ok… lets try an experiment On the count of three I would like everyone to try to make their heart stop beating for three seconds This is not long enough for a change in our bodies Ready… Set… Go!

Cardiac Muscle Tissue Cardiac muscle tissue is located in the heart and is designed for long term involuntary use These cells are designed to contract many times a minute for the entirety of a human life When they decide to take a 10 minute break… an organism dies Cardiac muscle cells are referred to as cardiocytes

Cardiac Muscle Tissue Cardiac tissue anchors on itself so it forms very strong interconnections with itself This creates branching networks of muscle cells that are interconnected These connections occur at places called intercalated discs

Cardiac Muscle Tissue Cardiac muscle cells do not wait for a nerve stimulus to start a contraction Instead they use a signal that is generated from a group of cells called pacemaker cells These cells monitor the level of blood needed in the body and send impulses that cause the heart to beat

Smooth Muscle Tissue Smooth muscle tissue is involuntary muscle tissue located in the walls of hollow organs These muscles are designed to create both short and long contractions that are not controlled the organism Imagine how much concentration and effort it would take for someone to control food from their mouth until it left them as waste

Smooth Muscle Tissue The smooth muscle tissue that lines the body is controlled by the nerves in the brain However the part of the brain that controls the smooth muscle tissues is at the base of the brain This is the area of the brain that we have very little (almost no) control over

Smooth Muscle Tissue Smooth muscle is often found in flat sheets that line organs If it was bulky it would block these hollow organs This means that it does not bundle the same way that skeletal muscle does Because of the lack of muscle control by the brain and the lack of bundles of fibers smooth muscle is referred to as nonstriated involuntary muscle