Insertion: tuberosity of radius, posterior border of ulna (via bicipital aponeurosis). Simpson (1945) provides systematics of mammal origins and relationships that had been taught universally until the end … Insertion: nasal edge of eyeball in front of its equator. They also protect the contents of the abdomen against injury and help support the body. arrest: A seizure or forcible restraint; an exercise of the power to deprive a person of his or her liberty; the taking or keeping of a person in custody by legal authority, especially, in response to a criminal charge. Action: pulls shoulder forward and down, elevates rib cage. follicle [fol´ĭ-k'l] a sac or pouchlike depression or cavity. Cricothyroid, genioglossus, geniohyoid, hyoglossus, palatoglossus, pharyngeal constrictor, styloglossus, stylopharyngeus, salpingopharyngeus, and thyrohyoid muscles. Nerve: oculomotor (CN III). Huxley and Harrison proposed the sliding filament hypothesis, to account for their observations. The lateral or the medial pterygoid muscle. Insertion: coronoid process of mandible. Action: dorsiflexes big toe. Elements, by definition, cannot be broken down to simpler substances with different chemical or physical properties. Origin: adjacent facial muscles that surround mouth. Origin: medial subscapular fossa. Nerve: axillary (C4-C6). Origin: inferior ramus of pubis, ramus of ischium, ischial tuberosity. Action: lowers mandible and raises hyoid bone. Cardiac muscle, which is found only in the heart, cannot be controlled consciously. Insertion: palmar surface of flexor retinaculum, palmar aponeurosis. Insertion: proximal phalanx of thumb and medial sesamoid bone. Origin: tendinous ring around optic nerve at rear of orbit. atretic ovarian follicle an involuted ovarian follicle. A ridge of myocardium on the inner wall of either atrium of the heart. Forearm, posterior: abductor pollicis longus, anconeus, brachioradialis, extensor carpi radialis brevis, extensor carpi radialis longus, extensor carpi ulnaris, extensor digitorum, extensor digitorum minimi, extensor indicis, extensor pollicis brevis, extensor pollicis longus, and supinator muscles. Mammal classification has been through several revisions since Carl Linnaeus initially defined the class, and at present, no classification system is universally accepted. Simpson (1945) provides systematics of mammal origins and relationships that had been taught universally until the end … Action: plantarflexes foot. Insertion: iliotibial tract of fascia lata, gluteal tuberosity of femur. Nerve, hand: median (C8-T1), ulnar (C8-T1). Nerves: cervical spinal C4-C8. It flexes the thumb at both the carpometacarpal joint and the metacarpophalangeal joint and is controlled by the median and the ulnar nerves. Origin: capitate bone of wrist and metacarpals 2-3. Either of the two muscles on each side of the pelvic region that rotate the thighs outward. Forearm muscle. Hand muscle. Shoulder muscle. Origin: midline of inner surface of thyroid cartilage. Action: adducts, extends, and medially rotates arm. Origin: temporal fossa of skull. Nerve: tibial (L4-L5). Nerve: radial (C6-C8). Origin: lateral epicondyle of humerus, proximal edge of ulna. The muscles between the ribs, lying beneath the external intercostals. A muscle whose fibers converge on only one side of a tendon. Abdominal wall muscle. Leg muscle. Action: opens mouth, protrudes mandible. Q. A tissue composed of mitochondrion-filled muscle cells that also contain neatly packed actin and myosin filaments; the filaments are arranged in cylindrical bundles called myofibrils. Mouth: buccinator, depressor anguli oris, depressor labii inferioris, levator anguli oris, levator labii superioris, mentalis, orbicularis oris, risorius, and zygomaticus muscle. Muscle of mastication. Action: tenses tympanic membrane, dampens excessive vibrations. A muscle of the medial thigh originating on the ramus of the pubis and inserted in the linea aspera of the femur. Atoms . A tissue composed of muscle cells (often multinucleated) that contain neatly packed actin and myosin filaments; these filaments are arranged in cylindrical bundles called myofibrils. Die glatte Muskulatur ist ein kontraktiler Gewebetyp.Es handelt sich um eine nicht willkürlich steuerbare Art von Muskulatur, die durch ihr Wirken unter anderem die Funktion, Anspannung und Form der inneren Organe beeinflusst.. 2 Eigenschaften. First Aid USMLE STEP 2 CK Origin: edges of sclera. Anterior and lateral: digastric, geniohyoid, mylohyoid, omohyoid, platysma, sternocleidomastoid, sternohyoid, sternothyroid, stylohyoid, and thyrohyoid muscles. A flat muscle with a broad origin and narrow insertion. Nerve: genitofemoral (L1-L2). Action: allows lens to become more curved to focus on near objects. Facial muscle. In clinical practice, referred to as the lateral rectus muscle. Action: turns eye up and outward with lateral rotation. Origin: upper outer edge of ilium and sacrum. Nerve: facial (CN VII) Action: closes eyelids, lifts cheeks, compresses lacrimal sac. Insertion: lateral surface of eyeball behind its equator. Origin: zygomatic process of maxilla, zygomatic arch. Action: extends forearm. Forearm muscle. Arm muscle. Insertion: coronoid process of ulna. Action: flexes forearm. Arm muscle. A contractile organ of the body which produces movements of the various parts or organs. Nerve: trigeminal (CN V). Nerve: femoral (L2-L3). Either of the two muscles that attach to the medial surface of the greater trochanter of the femur (the trochanteric fossa) where they mesh with the tendon of the obturator internus muscle. Skeletal muscle got its name because it usually attaches at one end to bone. A skeletal muscle that moves or stabilizes the head or the trunk. Action: pronates forearm. a sac or pouchlike depression or cavity. In each cell, the myofibrils are all aligned in the same direction and are parceled into longitudinal blocks (called sarcomeres) of similar lengths. It depresses the sides of the tongue and is innervated by cranial nerve XII (hypoglossal nerve). Forearm muscle. The abductor or flexor muscle of the thumb. Insertion: medial surface of ramus and angle of mandible. Origin: lower half of pubis. Origin: medial epicondyle of humerus, coronoid process of ulna. Action: flexes big toe, plantarflexes foot. Six elements (carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur—acronym CHNOPS) make up 95% of the body weight of organisms. Insertion: muscular process of arytenoid cartilage. Thigh muscle. Action: adducts, flexes, and rotates thigh medially. Nerve: sciatic L5-S2). Muscle derived from mesodermal somites, including most skeletal muscle. For every direct action made by a muscle, an antagonistic muscle can cause an opposite movement. Origin: lateral epicondyle of humerus. Deep layer: erector spinae and splenius. Insertion: central tendon (of diaphragm). Action: adducts hand, flexes wrist. Goose bumps or goosebumps are the bumps on a person's skin at the base of body hairs which may involuntarily develop when a person is tickled, cold or experiencing strong emotions such as fear, euphoria or sexual arousal.. Facial muscle. Nerve: radial (C5-C7). Charakteristisch für die glatte Muskulatur ist die langgestreckte, dünne Muskelzelle (Myozyt), die keine Querstreifung … Action: supports pelvis, holds anal canal at right angle to rectum. Twitch skeletal muscle cells containing myoglobin and many mitochondria. Cardiac muscle is innervated by both sympathetic and parasympathetic autonomic motor axons. Origin: lateral pterygoid plate. Nerve: musculocutaneous and radial (C5-C7). Insertion: bicipital groove of humerus. Nerve: accessory (CN XI), spinal C2. *The directions refer to those of the patient. Skeletal muscle cells contract more forcefully than smooth or cardiac muscle cells. Posterior: biceps femoris, semimembranosus, and semitendinosus muscles. Thigh muscle. Foot muscle. What can I do to build muscle and develop immunity? Pectoralis major, pectoralis minor, serratus anterior, subclavius, subscapularis, or teres major muscle. Origin: anterior surface of lower (distal) humerus. Action: adducts hand, extends wrist. Shoulder muscles -- the infraspinatus, subscapularis, supraspinatus, and teres minor muscles -- which hold the head of the humerus in the glenoid fossa of the scapula. Nose: depressor septi, nasalis, and procerus muscles. A muscle that encircles a duct, tube, or orifice, thus controlling its opening. muscle [mus´'l] a bundle of long slender cells (muscle fibers) that have the power to contract and hence to produce movement. It is extremely important to hydrate the irritated surface after Thin muscles that insert into the skin of the face; all are innervated by the facial nerve (CN VII). Middle layer: levator scapulae, rhomboid major, and rhomboid minor muscles. Nerve: thoracodorsal (C6-C8). It originates from the lateral epicondyle of the humerus, crosses the back of the elbow joint on the same side, attaches to the lateral surface of the olecranon process and the adjacent surface of the ulna. Ear: anterior, posterior, and superior auricular muscles. Action: turns eye medially. All these muscles are innervated by cervical spinal nerves, and most of these muscles act primarily to move and stabilize the head. Arm muscle.

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