LAB-2

CONTENTS

Lab Objectives:

• find the umbilicus as a landmark and name the mammary glands (teats)

• distinguish superficial fascia from deep fascia

• appreciate how cutaneous muscle differs from other skeletal muscles

• define extrinsic limb muscles and identify pectoral and brachicephalicus muscles and their component parts

CONTENTS

Anatomical Terms:

Superficial Structures

        umbilicus

        thoracic mammae (cranial & caudal)

        abdominal mammae (cranial & caudal)

        inguinal mammae

        superficial & deep fascia

        cutaneous trunci m.

                preputial muscle

Thoracic Limb Extrinsic Muscles & Related Structures

        superficial pectoral muscles

                (descending & transverse parts)

        deep (ascending) pectoral muscle

        brachiocephalicus m.

                clavicular intersection

                cleidobrachialis m.

                cleidocephalicus m.

                        pars cervicalis

                        pars mastoideus

CONTENTS

Dissection Hi-Lights:

1] Incise the skin as illustrated in Fig. 12 of your Dissection Guide. (If you can't identify the umbilicus in your cadaver, make a caudal incision at the position indicated in Fig. 12.)

Caution: Incise just the skin. Do not cut muscle tissue deep to the skin.

2] Reflect the skin and identify superficial fascia and mammary tissue.

Note: Click the image to view it enlarged.

3] Identify cutaneous trunci m. and remove it from the skin or surface of the trunk.

4] Locate the superficial and deep pectoral mm. The former has superficial and descending parts.

5] Locate the brachiocephalicus m. ...

CONTENTS

Clinical Significance:

A. Enlargement of an isolated mammary gland is suggestive of mastitis or mammary carcinoma.

B. Subcutaneous injections are made into spaces of loose alveolar tissue in superficial fascia.

CONTENTS

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