. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. 28 Anatomy of the Woodchuck, Marmota monax. Fig. 2-26. Left rib, caudal view. 1 costal tubercle. 2 neck, 3 head, 4 costal cartilage, 5 genu, 6 costochondral junction, 7 costal groove. Clavicula. The clavicle is a stout, somewhat bent bone (Figs. 2-1 and 2-29). Both ends are en- larged for articulation with the manubrium of the sternum and with the acromion of the scapula. Thoracic Limb. The skeleton of the thoracic limb consists of the humerus, radius and ulna, car- pals, metacarpals, and digital bones. Humerus. The humerus, humer
. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. 28 Anatomy of the Woodchuck, Marmota monax. Fig. 2-26. Left rib, caudal view. 1 costal tubercle. 2 neck, 3 head, 4 costal cartilage, 5 genu, 6 costochondral junction, 7 costal groove. Clavicula. The clavicle is a stout, somewhat bent bone (Figs. 2-1 and 2-29). Both ends are en- larged for articulation with the manubrium of the sternum and with the acromion of the scapula. Thoracic Limb. The skeleton of the thoracic limb consists of the humerus, radius and ulna, car- pals, metacarpals, and digital bones. Humerus. The humerus, humerus (Figs. 2-30 and 2-31), is the bone of the brachium or upper arm. It articulates proximally with the scapula at the shoulder joint, and distally with the radius and ulna at the elbow joint. The humerus consists of two extremities and a body or shaft. The proximal extremity consists of a head, caput humeri, which bears a large, oval articular surface, and two tubercles. The major tubercle, tuberculum majus, large and lies craniolateral to the head. The minor tubercle, tuberculum minus, is small and lies medial to the head. The two tubercles are separated cranially from each other by a shallow intertuber- cular groove, sulcus inter tubercular is (Fig. 2-30), for the passage of the tendon of the biceps muscle. The body of the humerus, corpus humeri, is rounded and has cranial, caudal, medial and lateral surfaces. It bears a large deltoid tubercle, tuberositas deltoidea, on the proximal cranial surface, and a small teres tubercle, tuberositas teres major, on the medial surface. A distinct ridge, crista humeri, ex- tends along the caudal surface from the minor tu- bercle to the lateral epicondyle. This ridges spirals from medial to lateral, forming a distinct groove, sulcus m. brachialis, for the brachial muscle. The distal part of the shaft widens laterally to form a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for re
Size: 1220px × 2048px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcollectionbiodiversity, booksponsorbiodi, booksubjectmammals
