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Jan 21, 2018 · Muscular System Anatomy, Diagram & Function | Healthline. human body maps. muscular system. Muscular. The primary job of muscles is to move the bones of the skeleton, but muscles also enable...
Nov 3, 2023 · The musculoskeletal system (locomotor system) is a human body system that provides our body with movement, stability, shape, and support. It is subdivided into two broad systems: Muscular system, which includes all types of muscles in the body. Skeletal muscles, in particular, are the ones that act on the body joints to produce movements.
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- Circular
- Convergent
- Parallel
- Pennate
Circular muscles (also known as skeletal sphincter muscles) have a fascicular pattern where the fascicles are arranged in concentric rings. Muscles with this arrangement surround external body openings, which they close by contracting. Muscles with this fascicular arrangement may be termed as orbicular muscles (Latin: orbiculus = small disc), such ...
A convergent (a.k.a. triangular) muscle has a broad origin with fascicles converging toward a single tendon of insertion. Such a muscle is triangular or fan shaped. One example is the pectoralis major muscle of the anterior thorax.
In a parallel arrangement, the length of the fascicles run to the long axis of the muscle. There are three types of parallel muscles: 1. quadrilateral muscles, which have a short, flat form e.g. thyrohyoid muscle 2. strap muscles, that have a narrow belt- or strap-like belly e.g. sartorius muscle 3. fusiform muscles, with a spindle-shaped and exten...
In a pennate pattern, the fascicles are short and they attach obliquely to a central tendon that runs the length of the muscle. Pennate muscles are of three forms: 1. Unipennate, in which the fascicles insert into only one side of the tendon, as in the extensor digitorum longus muscle of the leg; 2. Bipennate, in which the fascicles insert into the...
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- Mobility. The muscular system’s main function is to allow movement. When muscles contract, they contribute to gross and fine movement. Gross movement refers to large, coordinated motions and includes
- Stability. Muscle tendons stretch over joints and contribute to joint stability. Muscle tendons in the knee joint and the shoulder joint are crucial in stabilization.
- Posture. Skeletal muscles help keep the body in the correct position when someone is sitting or standing. This is known as posture. Good posture relies on strong, flexible muscles.
- Circulation. The heart is a muscle that pumps blood throughout the body. The movement of the heart is outside of conscious control, and it contracts automatically when stimulated by electrical signals.
4.4 Muscle Tissue – Anatomy & Physiology. Learning Objectives. Describe the characteristics of muscle tissue and how these dictate muscle function. By the end of this section, you will be able to: Identify the three types of muscle tissue. Compare and contrast the functions of each muscle tissue type.
- Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Mat...
- 2019
Cardiac muscle is the muscle tissue that makes up the walls of the heart. These muscles contract in a rhythmic way to pump blood to the whole body and they are involuntary meaning that we can’t consciously control this type of muscle. Lastly, is smooth muscle, which mainly lies in the walls of blood vessels and hollow organs.
Unit Outline. Part 1: Muscle Tissue. Overview of Muscle Tissue. Skeletal Muscle Fibers. The Sarcomere. Part 2: Types of Movement. Flexion and Extension. Hyperextension. Abduction and Adduction. Circumduction. Rotation. Supination and Pronation. Dorsiflexion and Plantar Flexion. Inversion and Eversion. Protraction and Retraction.
