The head of embryo turns through 45 degrees to mend its normal relationship with the shoulders, which are still at some angle.

It is the larger of the two muscles of the tympanic cavity. Its role is to dampen sounds, such as those produced from chewing.

These are one of the four types of lingual papillae present on the surface of the tongue.

It is a sensory receptor mainly found in the hypothalamus.

Implantation of human foetus typically occurs after one week, i.e. 7 days after fertilization.

It maximises the chances of a couple conceiving quickly. 

It is not a spermatogonium cell.

It is the male reproductive cell. It cannot divide itself and has a limited life span.

It is a vestigial remnant of the Mullerian duct located on the upper pole of the testis.

The serous covering of the testis is known as tunica vaginalis. It is a pouch of serous membrane originated from the processus vaginalis of the peritoneum.

These conjoin the rete testis with the initial section of the epididymis in the male reproductive system.

It is the complicated network of soft tubules located in the hilum of the testicle, which carries sperm from the seminiferous tubules to the vasa efferentia.

It is the longest portion of the human male urethra and is confined in the corpus spongiosum.

These are convoluted tubules located in front of the lower part of the spermatic cord. These tubes are lined with columnar ciliated epithelium, and are vestigial in human male reproductive system.

It is feature near the entrance of the seminal vesicles. It is evolved from the uterovaginal primordium.

It is a lean and thin layer, which loosely invests the cord. It is a continuation downward of the transversalis fascia.

It is a glycoprotein membrane covering the plasma membrane of an oocyte. It is an important constitutive part of the oocyte.

It is a yellow coloured temporary endocrine structure which is involved in production of relatively high level of progesterone and moderate level of estradiol and inhibin A.

These hormones are neccessary for plant growth to initiate the process of mitosis and meiosis.

The stroma of the ovary is a particular soft tissue, particularly supplied with enormous blood vessels consisting of spindle-shaped cells with a small amount of ordinary connective tissue.

This hormone initiates the seed germination and affects enzyme production that mobilizes food production, used for growth of new cells.

It is defined as the part of the visual system in the brain.

These are the only ganglia, which are two large irregularly shaped masses of nerve tissue present in the upper abdomen of humans.

It is a parasympathetic ganglion found in the pterygopalatine fossa. The flow of blood to the nasal mucosa is regulated by the pterygopalatine ganglion which heats or cools the air in the nose.

This plant hormone restricts shoot branching in the plant.