CSCC BIO 2300 Unit 4 Exam-Questions and Correct Answers (Expert verified)
/ Latest Update 2024/2025/100% Pass
Manubrium of sternum - ✔✔Articulates with ribs 1, 2, & clavicles. Sternocleidomastoid
muscles also attach here.
Jugular Notch - ✔✔central indentation in superior border of manubrium
Sternal Angle - ✔✔Ridge between manubrium and body at second rib
Body of Sternum - ✔✔the bony structure that forms the middle portion of the sternum
Xiphoid process of sternum - ✔✔bottom of sternum
Costal Margin - ✔✔lower border of rib margin formed by the medial edges of the 8th, 9th,
and 10th ribs
True Rib - ✔✔a rib that is attached directly to the breastbone (1-7)
False Rib - ✔✔8-12, This rib attaches to the vertebrae in the back and indirectly to the
sternum through cartilage (two words singular)
1st Rib - ✔✔origin of subclavius
7th Rib - ✔✔longest rib
12th Rib - ✔✔Inferior extent of pleura posteriorly
Costal Cartilage - ✔✔connects ribs to sternum; hyaline cartilage
Head of Rib - ✔✔Articulates with the costal facet of a thoracic vertebral body.
,Neck of Rib - ✔✔narrowed region of a rib, next to the rib head
Body of Rib - ✔✔main part of the rib distal to the neck
Tubercle of Rib - ✔✔A structure in the neck of the rib that articulates with the costal facet
of a thoracic vertebra's transverse process.
Angle of Rib - ✔✔portion of rib with greatest curvature; together, the rib angles form the
most posterior extent of the thoracic cage
Costal Groove of Rib - ✔✔muscle attachment; arteries, veins, and nerves run in the groove
Superior Pubic Ramus - ✔✔narrow segment of bone that passes laterally from the pubic
body to join the ilium
Ischiopubic Ramus - ✔✔narrow extension of bone that connects the ischial tuberosity to the
pubic body; formed by the junction of the ischial ramus and inferior pubic ramus
Pubic Arch - ✔✔Inverted V-shaped arch inferior to pubic symphysis. Over 90° in females,
and about 60° in males.
Pubic Symphsis - ✔✔A hard, bony, and cartilaginous prominence found at the midline in the
lowermost portion of the abdomen where the two halves of the pelvic ring are joined by
cartilage at a joint with minimal motion.
Ischial Spine - ✔✔located superior to the ischial tuberosity and projects medially into the
pelvic cavity
Sacrospinus Ligament - ✔✔from sacrum and coccyx to spine of ischium
, Ischial Tuberosity - ✔✔receives the weight of the body when sitting
Sacrotuberous Ligament - ✔✔connects sacrum to ischial tuberosity
Pelvic Inlet - ✔✔superior opening of true pelvis; bordered by pelvic brim
Male Pelvis - ✔✔Tilted less far forward
Adapted for support of male's heavier build and stronger muscles
Cavity of true pelvis is narrow and deep
Female Pelvis - ✔✔tilted forward, adapted to childbearing, broad, shallow, pubic angle
lightweight, 80-90◦
Urogenital Triangle - ✔✔contains the urethral and vaginal orifices in females and the base
of the penis and scrotum in males
Anal Triangle - ✔✔contains the anus and external anal sphincter in both sexes
External Intercostal M. - ✔✔when they contract, they elevate the ribs which results in an
increase in anteroposterior and lateral diameters of the chest cavity; responsible for 25% of
the air entering lungs during normal quiet breathing
Internal Intercostal M. - ✔✔Muscle of respiration
Depression of ribs during forced exhalation to decrease transverse dimensions (anterior-
posterior, medial-lateral) of thoracic cavity
Innermost Intercostal M. - ✔✔-the deeper fibers of the internal intercostal muscle
-separated from the internal intercostals by the intercostal nerves & vessels
Transversus Thoracis M. - ✔✔depress ribs (maybe proprioception)
/ Latest Update 2024/2025/100% Pass
Manubrium of sternum - ✔✔Articulates with ribs 1, 2, & clavicles. Sternocleidomastoid
muscles also attach here.
Jugular Notch - ✔✔central indentation in superior border of manubrium
Sternal Angle - ✔✔Ridge between manubrium and body at second rib
Body of Sternum - ✔✔the bony structure that forms the middle portion of the sternum
Xiphoid process of sternum - ✔✔bottom of sternum
Costal Margin - ✔✔lower border of rib margin formed by the medial edges of the 8th, 9th,
and 10th ribs
True Rib - ✔✔a rib that is attached directly to the breastbone (1-7)
False Rib - ✔✔8-12, This rib attaches to the vertebrae in the back and indirectly to the
sternum through cartilage (two words singular)
1st Rib - ✔✔origin of subclavius
7th Rib - ✔✔longest rib
12th Rib - ✔✔Inferior extent of pleura posteriorly
Costal Cartilage - ✔✔connects ribs to sternum; hyaline cartilage
Head of Rib - ✔✔Articulates with the costal facet of a thoracic vertebral body.
,Neck of Rib - ✔✔narrowed region of a rib, next to the rib head
Body of Rib - ✔✔main part of the rib distal to the neck
Tubercle of Rib - ✔✔A structure in the neck of the rib that articulates with the costal facet
of a thoracic vertebra's transverse process.
Angle of Rib - ✔✔portion of rib with greatest curvature; together, the rib angles form the
most posterior extent of the thoracic cage
Costal Groove of Rib - ✔✔muscle attachment; arteries, veins, and nerves run in the groove
Superior Pubic Ramus - ✔✔narrow segment of bone that passes laterally from the pubic
body to join the ilium
Ischiopubic Ramus - ✔✔narrow extension of bone that connects the ischial tuberosity to the
pubic body; formed by the junction of the ischial ramus and inferior pubic ramus
Pubic Arch - ✔✔Inverted V-shaped arch inferior to pubic symphysis. Over 90° in females,
and about 60° in males.
Pubic Symphsis - ✔✔A hard, bony, and cartilaginous prominence found at the midline in the
lowermost portion of the abdomen where the two halves of the pelvic ring are joined by
cartilage at a joint with minimal motion.
Ischial Spine - ✔✔located superior to the ischial tuberosity and projects medially into the
pelvic cavity
Sacrospinus Ligament - ✔✔from sacrum and coccyx to spine of ischium
, Ischial Tuberosity - ✔✔receives the weight of the body when sitting
Sacrotuberous Ligament - ✔✔connects sacrum to ischial tuberosity
Pelvic Inlet - ✔✔superior opening of true pelvis; bordered by pelvic brim
Male Pelvis - ✔✔Tilted less far forward
Adapted for support of male's heavier build and stronger muscles
Cavity of true pelvis is narrow and deep
Female Pelvis - ✔✔tilted forward, adapted to childbearing, broad, shallow, pubic angle
lightweight, 80-90◦
Urogenital Triangle - ✔✔contains the urethral and vaginal orifices in females and the base
of the penis and scrotum in males
Anal Triangle - ✔✔contains the anus and external anal sphincter in both sexes
External Intercostal M. - ✔✔when they contract, they elevate the ribs which results in an
increase in anteroposterior and lateral diameters of the chest cavity; responsible for 25% of
the air entering lungs during normal quiet breathing
Internal Intercostal M. - ✔✔Muscle of respiration
Depression of ribs during forced exhalation to decrease transverse dimensions (anterior-
posterior, medial-lateral) of thoracic cavity
Innermost Intercostal M. - ✔✔-the deeper fibers of the internal intercostal muscle
-separated from the internal intercostals by the intercostal nerves & vessels
Transversus Thoracis M. - ✔✔depress ribs (maybe proprioception)
