Question
Describe diagrammatically the male reproductive organs.
✓
Answer
Testis : The testis are one pair, ovoid structures enclosed in sac-like structures—the scrotal sacs or scrotum. The testis and scrotal sacs lie outside the body cavity near the penis. The scrotal sac is composed of body wall and communicates with the body cavity by a narrow canal the inguinal canal. Through the inguinal canal passes spermatic cord which is composed of connective tissue, artery, vein and a nerve each. Vas deferens also passes through inguinal canal.
Penis : The penis is a cylindrical organ which usually hangs in front of the scrotum.
The penis is composed of two corpora cavernosa on the front side and one corpus spongiosum around the urethra (Fig.). Corpus spongiosum is enlarged near the tip of the penis to form glans penis. The skin which surrounds the glans penis is loose and retractile. It is called prepuce or foreskin. The urethra communicates with the exterior by an aperture situated at the tip of the penis.
Accessory Sex Glands
These include mainly the following glands :
(i) Prostate glands
(ii) Seminal vesicles
(iii) Cowper’s glands
(iv) Perineal glands
(v) Rectal glands
(i) Prostate Glands : These are situated over the seminal vesicle and also in the dorsolateral region. It comprises of three or four lobes. These glands open into urinogenital duct by several small ductules. These secrete a white fluid which is alkaline in nature and is believed to be very useful for the sperms. Its secretion nourishes the spermatozoa.
(ii) Seminal Vesicles : These are situated between urinary bladder and rectum. These are long, sacculated musculoglandular organs. These secrete a fluid which activate the sperms. These do not store the spermatozoa as believed earlier.
(iii) Cowper’s Glands : These are situated beneath the prostate glands. They secrete a mucoid fluid at the time of copulation and throw it into the urethra.
(iv) Perineal Glands : These are also paired and discharge their contents of specific odour into perineal pouches situated between penis and anus.
(v) Rectal Glands : These are yellow coloured glands situated near rectum. Their secretion also has a specific odour.
Penis : The penis is a cylindrical organ which usually hangs in front of the scrotum.
The penis is composed of two corpora cavernosa on the front side and one corpus spongiosum around the urethra (Fig.). Corpus spongiosum is enlarged near the tip of the penis to form glans penis. The skin which surrounds the glans penis is loose and retractile. It is called prepuce or foreskin. The urethra communicates with the exterior by an aperture situated at the tip of the penis.
Accessory Sex Glands
These include mainly the following glands :
(i) Prostate glands
(ii) Seminal vesicles
(iii) Cowper’s glands
(iv) Perineal glands
(v) Rectal glands
(i) Prostate Glands : These are situated over the seminal vesicle and also in the dorsolateral region. It comprises of three or four lobes. These glands open into urinogenital duct by several small ductules. These secrete a white fluid which is alkaline in nature and is believed to be very useful for the sperms. Its secretion nourishes the spermatozoa.
(ii) Seminal Vesicles : These are situated between urinary bladder and rectum. These are long, sacculated musculoglandular organs. These secrete a fluid which activate the sperms. These do not store the spermatozoa as believed earlier.
(iii) Cowper’s Glands : These are situated beneath the prostate glands. They secrete a mucoid fluid at the time of copulation and throw it into the urethra.
(iv) Perineal Glands : These are also paired and discharge their contents of specific odour into perineal pouches situated between penis and anus.
(v) Rectal Glands : These are yellow coloured glands situated near rectum. Their secretion also has a specific odour.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Highlights the reproductive health issues and strategies.
Write the conclusions Mendel arrived at on dominance of traits on the basis of monohybrid crosses that he carried out in pea plants.
What are the major causes of species losses in geographical area?
What is meant by the term biopesticide? Name and explain the mode of action of a popular biopesticide.
- Draw a labelled longitudinal view of an albuminous seed.
- How are seeds advantageous to flowering plants?
Write the components of nucleotide. Write one important feature of the structure of double helical DNA. Draw a labelled diagram of double helical DNA.
- A garden pea plant bearing terminal, violet flowers, when crossed with another pea plant bearing axial, violet flowers produced axial, violet flowers and axial, white flowers in the ratio of 3 : 1. Work out the cross showing the genotypes of the parent pea plants and their progeny.
- Name and state the law that can be derived from this cross and not from a monohybrid cross.
Name the modern technology of crop improvement. How is it beneficial in crop improvement? Explain. ###Write an essay on tissue culture.
Answer the following questions:
Describe the stages in embryo development in a dicot plant.
Describe the stages in embryo development in a dicot plant.
What is nucleosome. Draw a labelled diagram of nucleosome. Explain the structures of DNA helix.