Concept explainers
(a)
To determine:
The muscle used to pull the stalled car.
Introduction:
Muscles of the pectoral girdle are of two types, anterior group muscle and posterior group muscle. The anterior group contains two muscles, pectoralis minor and serratus anterior. The pectoralis minor arises from the 3-5 ribs, while, the serratus anterior arises from most of the ribs. The posterior group contains three deep muscles, the rhomboid minor, the rhomboid major, and levator scapulae.
(b)
To determine:
The muscle used in paddling the canoe.
Introduction:
Muscles of the pectoral girdle are of two types, anterior group muscle and posterior group muscle. The anterior group contains two muscles, pectoralis minor and serratus anterior. The pectoralis minor arises from the 3-5 ribs, while, the serratus anterior arises from most of the ribs. The posterior group contains three deep muscles, the rhomboid minor, the rhomboid major, and levator scapulae.
(c)
To determine:
The muscle that is used in squaring the muscle during military action.
Introduction:
Muscles of the pectoral girdle are of two types, anterior group muscle and posterior group muscle. The anterior group contains two muscles, pectoralis minor and serratus anterior. The pectoralis minor arises from the 3-5 ribs, while, the serratus anterior arises from most of the ribs. The posterior group contains three deep muscles, the rhomboid minor, the rhomboid major, and levator scapulae.
(d)
To determine:
The muscle used to lift the shoulder to carry a heavy box on it.
Introduction:
Muscles of the pectoral girdle are of two types, anterior group muscle and posterior group muscle. The anterior group contains two muscles, pectoralis minor and serratus anterior. The pectoralis minor arises from the 3-5 ribs, while, the serratus anterior arises from most of the ribs. The posterior group contains three deep muscles, the rhomboid minor, the rhomboid major, and levator scapulae.
(e)
To determine:
The muscle used to lower the shoulder to grasp the suitcase.
Introduction:
Muscles of the pectoral girdle are of two types, anterior group muscle and posterior group muscle. The anterior group contains two muscles, pectoralis minor and serratus anterior. The pectoralis minor arises from the 3-5 ribs, while, the serratus anterior arises from most of the ribs. The posterior group contains three deep muscles, the rhomboid minor, the rhomboid major, and levator scapulae.

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