Question

Largest animal cell is of
A) Ostrich
B) Duck
C) Human
D) Hen

Answer 1

Animal cells are the essential unit of life for animals in the kingdom of Animalia. They are eukaryotic cells , meaning they have a true nucleus and specialised structures called organelles that perform various functions.

Complete answer:
Animal cells do not have plant-specific organelles, such as cell walls that sustain a plant cell, or chloroplasts, an organelle that performs photosynthesis. Eukaryotic cells are differentiated from prokaryotic cells by the presence of a fixed nucleus and other membrane-bound organelles, such as mitochondria, endoplasmic reticulum, and the Golgi apparatus.Prokaryotic cells do not have a fixed nucleus (instead, the area of the cytoplasm – called the nucleotide – contains the genetic material). They also lack membrane-bound organelles.Animals are all multicellular, meaning that several cells function together to shape the whole organism. These cells may be highly adapted in complex organisms, such as humans, to perform various functions. As such, they also look and act very differently from each other, even though they are all human cells.

Animal cells vary in size from a few microscopic microns to a few millimetres. The largest known animal cell is the ostrich egg, which can reach about 5.1 inches wide and weighs around 1.4 kilogrammes. This is in stark contrast to the neuron in the human body, which is just 100 microns long. The shape of animal cells also varies, with some being smooth, others oval or rod-shaped.There are several types of animal cells, each built to serve unique functions.
The most popular forms of animal cells are the following:
a) Skin Cells
Melanocytes, keratinocytes, Merkel cells and Langerhan cells
b) Muscle Cells
Myocyte, myosatellite cells, tendon cells, heart muscle cells cells
c) Blood Cells
Leukocytes, erythrocytes, platelets
d) Nerve cells,
Schwann cell, glial cells, etc.
e) Fat Cell
Adipocytes

Thus the correct answer is option (A) Ostrich.

Note: Animal cells are normally smaller than plant cells. It is irregular in form which is primarily due to the lack of an exterior wall called a cell wall. Animal's body produces millions of cells every day, with more than 100 to 150 million cells dying every second to every minute in the human body. Animal cells undergo either mitosis or meiosis cell division to multiply their numbers.