As water is hypotonic to cells, the blood cells, that is, in the absence of cell wall will continue to enlarge until they get burst. In case of a dehydrated patient, one hydrates them with the help of drip feed. If one is giving them hypertonic saline, it would be like consuming seawater, and the cells would dehydrate more as they would get into the bloodstream.
In case, if one is administering them hypotonic saline, then the cells of the blood would absorb more water and get burst. Thus, there is a need to present the patient with isotonic saline drips.
Explanation:
Segmentation in biology is the division of some animal and plant body plans into a series of repetitive segments. This article focuses on the segmentation of animal body plans, specifically using the examples of the taxa Arthropoda, Chordata.
Answer:
The correct answer is option B, that is, an endoskeleton evolved to enclose the dorsal nerve cord, which develops from the notochord.
Explanation:
It has been discovered that the ancestors of the modern-day fish were vertebrate chordates. The vertebrate chordates are considered to have evolved from the invertebrate chordates that are identical to the present day tunicates. It has been found that in vertebrates the endoskeleton has evolved to encompass the dorsal nerve cord that has been developed from the notochord (a characteristic of invertebrates).
A: glans penis- sex organ
B: scrotum- keeps testis at a lower temperature
C: testicles(testis)- produces sperm and testosterone
D: seminal vesicle/ ejaculatory duct- produces seminal fluid which feeds the sperm and allows them to swim.