What is the longest cell in the world?
If talking of human body, largest cell is OVUM or egg cell owing to its diameter however nerve cells are the longest cell. And all over the world the largest and longest cell are the NERVE CELLS Giant Squid and Colossal Squid.
Which cell is the smallest?
Granule Cell
Which is largest animal cell?
Caulerpa taxifolia is the largest animal cell. it is an aquatic alga. Largest animal cell is ostrich eggs measuring about 170*135 mm in diameter.
What is the function of RBC?
What Is the Function of Red Blood Cells? Red blood cells carry oxygen from our lungs to the rest of our bodies. Then they make the return trip, taking carbon dioxide back to our lungs to be exhaled.
What did Robert Hooke say about cells?
Hooke had discovered plant cells — more precisely, what Hooke saw were the cell walls in cork tissue. In fact, it was Hooke who coined the term “cells”: the boxlike cells of cork reminded him of the cells of a monastery. Hooke also reported seeing similar structures in wood and in other plants.
What is the largest single celled animal?
Summary: Biologists used the world’s largest single-celled organism, an aquatic alga called Caulerpa taxifolia, to study the nature of structure and form in plants. It is a single cell that can grow to a length of six to twelve inches.
Did RBC ever have nucleus?
As red blood cells contain no nucleus, protein biosynthesis is currently assumed to be absent in these cells. Because of the lack of nuclei and organelles, mature red blood cells do not contain DNA and cannot synthesize any RNA, and consequently cannot divide and have limited repair capabilities.
Why is RBC Biconcave?
RBCs are disc-shaped with a flatter, concave center. This biconcave shape allows the cells to flow smoothly through the narrowest blood vessels. Many RBCs are wider than capillaries, but their shape provides the needed flexibility to squeeze through.
Why do RBC have no nucleus?
Red Blood Cells are produced in the bone marrow and they have a nucleus when they are initially produced. Later, they lose nucleus in order to accommodate more haemoglobin so that they can transport more amount of oxygen. Therefore they are still considered as cells.
Which part is not present in an animal cell?
Chloroplast
Which cell in human body have a branched structure?
Nerve cell
Which is smallest WBC?
lymphocytes
Who is Robert Hooke and what did he discover about cells?
Hooke is best known today for his identification of the cellular structure of plants. When he looked at a sliver of cork through his microscope, he noticed some “pores” or “cells” in it. Hooke believed the cells had served as containers for the “noble juices” or “fibrous threads” of the once-living cork tree.
What did Hooke call his discovery?
law of elasticity
Which is largest human cell?
ovum
What is a Biconcave?
Biconcave. Definition: Concave on both sides of a structure, usually referring to a disc or a lens. Of particular importance to physiology is the structure of mature red blood cells (erythrocytes), which is a flattened cell that has assume a biconcave shape.
What is the smallest cell in human body?
sperm
Who invented human cell?
Robert Hooke
Why RBC is called a cell?
Answer: Initially, there is a nucleus when rbc are formed and as the cell matures the size of the nucleus decreases to increase area for oxygen transport thus we called it a cell, Red Blood Cells.