Which statement is correct about Ostia in cockroach?

So the correct answer is ‘It has a 13-chambered heart with a pair of ostia in each chamber’.

Which statement is correct about Ostia in the blood circulation in cockroach?

In the circulatory system of cockroaches, only blood is there. Presence of aorta and veins is not seen. Therefore, this is the incorrect option. Therefore, the correct statement is (C) It has a 13 chamber heart with a pair of ostia in each chamber.

Which of the following is correct in cockroach blood vessels?

Heart of cockroach is a dorsal, pulsatile 13 chambered (ten abdominal and three thoracic) structure. This heart is, in fact, the dorsal blood vessel, which pulsates with the help of external alary muscles, that is why it is also called as myogenic heart. Thus the correct answer is option D.

How many Ostia are in cockroach heart?

Two numbers of Ostia are present at the posterior end of heart of Cockroach.

Which sentence is correct for circulatory system of cockroach?

So the correct answer is ‘It has a 13-chambered heart with a pair of ostia in each chamber’.

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Which is the path of blood circulation in cockroach?

In cockroach, the flow of haemolymph is heart → head→ perivisceral sinus → pericardial sinus → ostia → heart. Heart in a cockroach is neurogenic. Haemocoel (body cavity) is a perivisceral cavity filled with colourless blood (haemolymph).

How many eggs are in an Ootheca?

German Cockroach Eggs

One ootheca can contain up to 50 eggs. Egg to adult takes 103 days, on average. Because they produce so many eggs that develop so quickly, their population grows very rapidly.

Is cockroach a Coelomate?

Cockroaches also have true coelom. However, the body cavity of cockroach is called as haemocoel as the body cavity remain filled with insect blood (haemolymph). They do not posses an arrangement of blood vessels as in mammals.

What is the middle part of cockroach body?

After entering the stomach of the cockroach, food is broken down by enzymes present within the gastric caecea and in the middle of the intestines is the mid-gut, which is responsible for nutrient absorption. Spiracles are visible on the sides of the cockroach’s body; these are used for breathing.

What is the main excretory product in cockroach?

Hint: Uricotelic species include reptiles, birds, ground snails, and insects such as cockroaches, which excrete nitrogenous wastes as uric acid in the form of pellets or paste with minimal water loss. The key components of cockroach and other insect excreta are urea and uric acid.

Which of the following is absent in circulatory system of cockroach?

The blood of the cockroach is colorless due to the absence of haemoglobin which is the respiratory pigment in blood. Therefore, its blood lacks respiratory pigment or haemoglobin.

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Which of the following is character of cockroach?

Cockroaches are generalized insects with few special adaptations, and may be among the most primitive living Neopteran insects. They have a relatively small head and a broad, flattened body, and most species are reddish-brown to dark brown. They have large compound eyes, two ocelli, and long, flexible antennae.

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