The Male Reproductive System. Flashcards

1
Q

Define the crura?

A

Plural for crus.

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2
Q

Define erectile tissue?

A

Another name for the corpuscavernosum.

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3
Q

Define the male gonad?

A

Another term for the testicles.

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4
Q

Define spermatozoa?

A

Male gametes.

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5
Q

Define the spermatic fascia?

A

The fascia that surrounds the vaginal tunic.

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6
Q

What are the 7 organs/features that make up the male reproductive system?

A

Scrotum.

Testes.

Epididymus.

Deferent ducts.

Prostate gland.

Penis.

Urethra.

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7
Q

What is the scrotum?

A

A pouch of skin that is divided by a median septum into 2 cavities.

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8
Q

Where is the canine scrotum located?

A

Between the thighs and around 2 thirds of the distance from the anus to the preputial opening.

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9
Q

What kind of shape is the scrotum?

A

Spherical.

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10
Q

What is the first layer of the scrotum?

A

The integument which is pigmented and covered in fine hairs.

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11
Q

What is found within the integument?

A

It contains well developed sebaceous and tubular glands and it also contains a deep layer of smooth muscle.

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12
Q

What is the layer of smooth muscle in the integument known as?

A

The dartos.

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13
Q

What is the function of the dartos?

A

To contract and draw the testes closer to the body.

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14
Q

What is the male gonad or testes?

A

2 oval structures that are located in the scrotum.

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15
Q

What is the outmermost covering that covers the testes?

A

An outer membrane known as the visceral vaginal tunic.

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16
Q

What layer is found below the visceral vaginal tunic?

A

The tunica albuginea.

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17
Q

What is the tunica albuginea?

A

A dense, white fibrous capsule that makes up the surface of the testicles.

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18
Q

What is found within the testes?

A

Many coiled tubes called the seminiferous tubules.

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19
Q

What are the 2 types of cells that are found within the seminefrous tubules?

A

Spermatazoa.

Sertoli cells.

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20
Q

What are the spermatozoa that are found in the testes?

A

Male gametes which can be used to fertilise a female egg cell.

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21
Q

What are the sertoli cells that are found in the testes?

A

Specialised cells that support to the sperm cells.

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22
Q

Where will all of the seminferous tubules within the testes combine?

A

At a large collecting duct called the rete testis.

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23
Q

What is the structure of the rete testis?

A

A myriad of tubules that flow through the efferent ductules into a structure the head of the epididymus.

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24
Q

Is the epididymus inside or outside of the testes?

A

Technically it is outside of the testes as it lies above the tunica vaginalis.

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25
Q

What is the main function of the epididymus?

A

To connect the testes to the vas deferens.

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26
Q

What are the 3 areas of the epididymus?

A

Head.

Body.

Tail.

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27
Q

Where is the head of the epididymus located?

A

It is the area that is located closest to the efferent ductules.

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28
Q

Where will sperm enter the epididymus?

A

At the head.

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29
Q

Where is the body of the epididymus?

A

It lies between the head and tail.

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30
Q

What structure does the tail of the epididymus come into contact with?

A

The vas deferens.

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31
Q

Where is the tail of the epididymus located?

A

It is located at the caudal end of the testes.

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32
Q

Where in relation to the testes is the head of the epididymus located?

A

It is located at the cranial end of the testes.

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33
Q

Where do the ductus deferens arise from?

A

From the tail of the epididymus.

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34
Q

What are the ductus deferens responsible for?

A

For transporting sperm from the epididymis to the ejaculatory ducts.

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35
Q

What strucutre does the ductus deferens attach to?

A

It attaches to a structure called the mesorchium.

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36
Q

What helps the ductus deferens to attach to the mesorchium?

A

A structure mesoductus deferens.

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37
Q

What structures accompany the ductus deferens as it travels to the ejaculatory ducts?

A

The small deferent artery and vein.

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38
Q

What kind of gland is the prostate gland?

A

An exocrine gland.

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39
Q

What is the only accessory sex gland within the dog?

A

The prostate.

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40
Q

Where is the prostate gland located?

A

Near the neck of the bladder where it will envelop the urethra.

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41
Q

What is the inguinal canal?

A

A structure that lies between the abdominal muscles.

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42
Q

Will the inguinal canal be found exclusively in males?

A

No, it is found in both sexes.

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43
Q

What is the inguinal canal defined as?

A

As a short fissure that is filled with connective tissue.

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44
Q

What does the inguinal canal allow for in males?

A

It allows the vaginal tunic and spermatic cord to pass through.

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45
Q

What does the inguinal canal allow for in females?

A

It allows the round ligament to pass through.

46
Q

Where is the opening of the inguinal canal located?

A

In the inner walls of the abdominal cavity at a location known as the deep inguinal ring.

47
Q

Where does the spermatic cord enter the inguinal canal?

A

At the superficial ring and it will travel towards the deep ring.

48
Q

Where does the inguinal canal extend towards from its opening at the deep inguinal ring?

A

Towards the superficial inguinal ring.

49
Q

Where is the superficial inguiinal ring located?

A

On the superficial surface of the abdominal cavity.

50
Q

Where is the superficial inguiinal ring located in relation to the deep ring?

A

It is more caudal than the deep inguinal ring.

51
Q

What is the lateral boundary of the inguinal canal?

A

The aponeurosis of the external abdominal oblique.

52
Q

What is the cranial boundary of the inguinal canal?

A

The caudal border of the internal abdominal oblique.

53
Q

What is the medial boundary of the inguinal canal?

A

The superficial surface of the rectus abdominis.

54
Q

What are the 2 main structures that pass through the inguinal canal in males?

A

The male vaginal tunic.

The spermatic cord.

55
Q

What are the 2 main structures that pass through the inguinal canal in females?

A

The vaginal process.

The round ligament.

56
Q

What are the 3 main structures that pass through the inguinal canal in both males and females?

A

The external pudendal artery.

The external pudendal vein.

The genitofemoral nerves.

57
Q

What is the vaginal process?

A

A feature of the peritoneum that is present in both males and females.

58
Q

In males, what is the vaginal process also known as?

A

As the vaginal tunic.

59
Q

What is the function of the vaginal process in males?

A

To surround the testes and structures of the spermatic cord.

60
Q

The spermatic cord is located inside what organ?

A

Inside the vaginal process/tunic.

61
Q

What are the 2 layers that make up the vaginal process?

A

The parietal vaginal tunic.

The visceral vaginal tunic.

62
Q

What is the parietal vaginal tunic?

A

The outer layer of the vaginal process.

63
Q

What is covered by the parietal vaginal tunic?

A

It covers the spermatic cord from the deep inguinal ring to the bottom of the scrotum.

64
Q

What is the visceral vaginal tunic?

A

The inner layer of the vaginal process.

65
Q

What structures is the visceral vaginal tunic closely associated with?

A

It is closely fused to the testes and epididymis.

66
Q

What 2 structures will the visceral vaginal tunic surround?

A

The ductus deferens.

The mesorchium.

67
Q

What is the mesorchium?

A

A structure that contains the blood vessels and nerves that supply the testes.

68
Q

The nerves and blood vessels that supply the testes will follow the path of what organ?

A

The path of the deferens duct.

69
Q

The nerves and blood vessels that supply the testes and the deferens duct are surrounded by what strucuture?

A

They are all surrounded by a structure called the mesoductus deferens.

70
Q

Are the nerves and blood vessels that supply the testes and the deferens duct considered to be part of the mesorchium?

A

Yes.

Even though the mesoductus deferens prevents them from being in contact with the mesorchium.

71
Q

What are the 3 distinct parts that make up the spermatic cord?

A

The ductus deferens.

The testicular artery.

The testicular vein.

72
Q

What structure covers the spermatic cord?

A

The vaginal tunic.

73
Q

Where does the spermatic cord travel to and from?

A

It travels from the testes, through the inguinal canal.

74
Q

The cremaster muscle is part of what organ within the male genitalia?

A

The cremaster muscle is part of the spermatic cord.

75
Q

Where does the cremaster muscle arise from and insert into?

A

From the internal abdominal oblique and inserts onto the spermatic fascia and the parietal vaginal tunic.

76
Q

What is the main function of the cremaster muscle?

A

To regulate the temperature of the testes by pulling the testes closer to the body or allowing them to be further away from the body.

77
Q

Is the cremaster muscle part of the spermatic cord?

A

No, it only accompanies the spermatic cord.

78
Q

In the male reproductive system, are the testicular artery, testicular vein, lymph vessels and nerves closely associated with each other?

A

Yes.

79
Q

What shape is the testicular artery?

A

It is torturous, meaning it winds around alot.

80
Q

What is woven around the testicular artery?

A

The nerves and the veinous plexus.

81
Q

What does the veinous plexus that surrounds the testicular artery consist of?

A

All of the veins that take blood away from the testes.

82
Q

What is the veinous plexous also known as?

A

As the papinform plexus.

83
Q

What is the function of the papinform plexus?

A

It helps to insulate the artery and maintain a constant temperature in the testes.

84
Q

What main artery is the testicular artery a part of?

A

The aorta.

85
Q

What main vein is the testicular vein a part of?

A

The vein cava.

86
Q

What are the 4 paired muscles that are found in the penis?

A

The retractor penis.

The ischiocavernosus muscles.

The bulbospongiosus muscles.

The ischiourethralis muscle.

87
Q

Where are the ischiocavernosus muscles found within the penis?

A

They cover the crura of the penis which is a section that is also known as the root of the penis.

88
Q

Where does the structure of the penis begin?

A

At the root of the penis.

89
Q

Where is the root of the penis located?

A

At the back of the ischium.

90
Q

Where does the ischiocaernosus muscle attach to?

A

To the ischiatic tuberosity.

91
Q

Which muscle marks the root of the penis?

A

The ischiocaernosus muscle.

92
Q

What part of the penis do the bulbospongiosus muscles cover?

A

The superficial surface of the bulb of the penis.

93
Q

What are the 3 defined areas of the penis?

A

The root.

The body.

The glans.

94
Q

What are the 2 areas that the glans penis is subdivided into?

A

The bulbus glandis.

The pars longa glandis.

95
Q

What is the root of the penis composed of?

A

2 crura which are individually known as a crus.

96
Q

What are the characteristics of each crus that makes up the root of the penis?

A

Each crus is filled with blood and contains the corpuscavernosum.

97
Q

What is the corpuscavernosum?

A

The main tissue that makes up the penis and it extends distally into the body or shaft of the penis.

98
Q

What is the corpuscavernosum surrounded by?

A

A capsule known as the tunica albigunea.

99
Q

Other than on the corpuscavernosum, what else is surrounded by the tunica albigunea?

A

The testes.

100
Q

What is the bulb of the penis?

A

A partially bilobed sac that is found between the 2 crura and it is continuous with the corpus spongiosum.

101
Q

What feature within the penis is also surrounded by the bulb of the penis?

A

The urethra.

102
Q

What happens to the 2 crura at the body of the penis?

A

The 2 crura join up to each other.

103
Q

Where is the body of the penis located?

A

Distal to the bulb.

104
Q

What is the body of the penis surrounded by?

A

The corpus spongiosum which is continuous with the bulbus penis.

105
Q

What strucutre is surrounded by the body of the penis?

A

The urethra which continues through the glans region to the point where it terminates.

106
Q

What is the glans penis divided into?

A

Into the bulbus glandis and the par long glanda.

107
Q

What is the bulbus glandis?

A

It is proximal to the par longa glanda and it is a ringlike structure.

108
Q

What is the par longa glanda?

A

It is distal to the bulbus glandis and it forms the apex of the penis.

109
Q

What is the os penis?

A

A long bone that lies almost entirely within the glans penis.

110
Q

What is the os penis formed from?

A

From the ossification of the fused distal ends of the corpora cavernosa.

111
Q

What is the os penis surrouned by?

A

By corpus spongiosum which proceeds all the way down the length of the penis.