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Q.3 Answer ALL parts: (a) Figure 4.1 below shows a drawing of an external view of a mammalian heart. Two cross-sections were made of the heart: Section 1 was made across the line A-B Section 2 was made across the line C-D Drawings of the two sections were viewed from above as shown by the arrow on Figure 4.1. Figure 4.2 is a drawing of section A-B, whilst Figure 4.3 is a drawing of section C-D. 3 B A B Figure 4.1 Figure 4.2 X. Figure 4.3 i. Name structures 1, 2 and 3 as shown in Figure 4.2. ii. Explain why the wall of chamber Y is thicker that the wall of chamber X as shown in Figure 4.3. iii. Explain how the contractions of the chambers of the heart are coordinated during one cardiac cycle.

Q.3 Answer ALL parts: (a) Figure 4.1 below shows a drawing of an external view of a mammalian heart. Two cross-sections were made of the heart: Section 1 was made across the line A-B Section 2 was made across the line C-D Drawings of the two sections were viewed from above as shown by the arrow on Figure 4.1. Figure 4.2 is a drawing of section A-B, whilst Figure 4.3 is a drawing of section C-D. 3 B A B Figure 4.1 Figure 4.2 X. Figure 4.3 i. Name structures 1, 2 and 3 as shown in Figure 4.2. ii. Explain why the wall of chamber Y is thicker that the wall of chamber X as shown in Figure 4.3. iii. Explain how the contractions of the chambers of the heart are coordinated during one cardiac cycle.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Q.3 Answer ALL parts: (a) Figure 4.1 below shows a drawing of an external view of a mammalian heart. Two cross-sections were made of the heart: Section 1 was made across the line A-B Section 2 was made across the line C-D Drawings of the two sections were viewed from above as shown by the arrow on Figure 4.1. Figure 4.2 is a drawing of section A-B, whilst Figure 4.3 is a drawing of section C-D. B B A 2 Figure 4.1 Figure 4.2 X. Figure 4.3 i. Name structures 1, 2 and 3 as shown in Figure 4.2. ii. Explain why the wall of chamber Y is thicker that the wall of chamber X as shown in Figure 4.3. iii. Explain how the contractions of the chambers of the heart are coordinated during one cardiac cycle.
Transcribed Image Text:Q.3 Answer ALL parts: (a) Figure 4.1 below shows a drawing of an external view of a mammalian heart. Two cross-sections were made of the heart: Section 1 was made across the line A-B Section 2 was made across the line C-D Drawings of the two sections were viewed from above as shown by the arrow on Figure 4.1. Figure 4.2 is a drawing of section A-B, whilst Figure 4.3 is a drawing of section C-D. B B A 2 Figure 4.1 Figure 4.2 X. Figure 4.3 i. Name structures 1, 2 and 3 as shown in Figure 4.2. ii. Explain why the wall of chamber Y is thicker that the wall of chamber X as shown in Figure 4.3. iii. Explain how the contractions of the chambers of the heart are coordinated during one cardiac cycle.
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