Spiracle, spir′a-kl, n. a breathing-hole: any minute passage.

What do mean by spiracles?

1 : a breathing hole : vent. 2 : a breathing orifice: such as. a : blowhole sense 2. b : an external tracheal aperture of a terrestrial arthropod that in an insect is usually one of a series of small apertures located along each side of the thorax and abdomen — see insect illustration.

Are spiracles?

Spiracles are openings or tiny pores on the surface of some animals, which usually lead to respiratory systems. In cockroach, respiration occurs through spiracles – a small opening on the sides of its body. ... The respiratory organ of the cockroach is referred to as tracheae.

What are called spiracles or stigmata?

A spiracle or stigma is the opening in the exoskeletons of insects and some spiders to allow air to enter the trachea. In the respiratory system of insects, the tracheal tubes primarily deliver oxygen directly into the animals' tissues. The spiracles can be opened and closed in an efficient manner to reduce water loss.

Which animal breathe through spiracles?

Instead of nostrils, insects breathe through openings in the thorax and abdomen called spiracles. Insects that are diapausing or non-mobile have low metabolic rates and need to take in less oxygen. Insects exchange oxygen and carbon dioxide through spiracles (noted by circle).

What is the meaning of the word SPIRACLE?

Where can you find spiracles?

The spiracles are located laterally along the thorax and abdomen of most insects—usually one pair of spiracles per body segment.

What are shark spiracles?

Many sharks, especially bottom-dwelling species, have paired openings called spiracles located between the eye and the gill slits. Spiracles are used to take in water and ventilate the gills, even while the shark may be feeding or at rest on the bottom.

What is spiracles class 7th?

Answer: (a) spiracles. Insects breathe through the holes on their bodies; these holes are called spiracles. Thus, the exchange of gases in insects takes place through the spiracles.

What are spiracles dogfish?

The spiracle is a vestigial first gill slit. It appears as an opening behind the eye, as in the spiny dogfish photo below. ... In the rays, the spiracle is much larger and more developed and is used to actively pump water over the gills to allow the ray to breathe while buried in the sand.

Do earthworms have spiracles?

Spiracles in cockroaches and skin in earthworm functional as a part of respiratory organ... Spiracles are the exterior openings of the Tracheal system in cockroach that interact with the outer environment into which the air passes.... Moist skin of earthworm is respiratory in function...

Do all abdominal segments have spiracles?

Do all abdominal segments have spiracles? ... Yes, there are spiracles on the thoracic segments.

Do bees have spiracles?

The parts needed to breathe

These holes, called spiracles, allow oxygen to move directly into the insect's body. In bees, as in most insects, each spiracle opens into a tube called a trachea.

What are spiracles quizlet?

What are spiracles? - openings into the tracheae of insects. - openings into the alveoli of the lungs. - openings between the gills of a frog tadpole. - openings to the bronchi.

What are spiracles in one sentence?

a breathing hole; an opening by which a confined space has communication with the outer air; air hole.

What is meaning of spiracles in Marathi?

spiracle in Marathi मराठी

spiracle ⇄ spiracle, noun. 1. a small opening for breathing.

What are spiracles very short answer?

Spiracles are the minute opening on an insect's body from where air enters into the tracheal system.

What animal has spiracles?

Spiracles are breathing openings found on the surface of insects, certain cartilaginous fish such as certain species of sharks, and stingrays.

Do Great Whites have spiracles?

These sharks also have prominent spiracles, or respiratory openings behind the eyes that allow the fish to pull in water while buried under sand. ... Sharks from this group (which includes great white, mako and whale sharks) would indeed die from lack of oxygen if they stopped swimming.

Do mosquitoes have spiracles?

Respiratory gas exchanges in mosquitoes occur through a multi-branched tracheal system, where cuticular openings called “spiracles” are located on the thorax and the abdomen. ... In adult mosquitoes, spiracles are paired, bilaterally symmetric and located on the mesothorax, metathorax, and abdominal segments.

What are spiracles and trachea Class 7?

spiracles-In the respiratory system of insects, the tracheal tubes which deliver oxygen directly into the animals' tissues. Trachea-Also called windpipe, it is a bony tube that connects the nose and mouth to the lungs, and is an important part of the respiratory system in vertibrates.

What do spiracles look like?

The spiracle is a small hole behind each eye that opens to the mouth in some fish. In the primitive jawless fish, the first gill opening immediately behind the mouth is essentially similar to the other gill opening. ... Blowholes in cetaceans are also sometimes referred to as spiracles.

What is book lungs?

book lung, form of respiratory organ found in certain air-breathing arachnid arthropods (scorpions and some spiders). Each book lung consists of a series of thin plates that are highly vascular (i.e., richly supplied with blood) and are arranged in relation to each other like the pages of a book.

What are gill lamellae?

In fishes, gill lamellae are used to increase the surface area between the surface area in contact with the environment to maximize gas exchange (both to attain oxygen and to expel carbon dioxide) between the water and the blood.

Do leopard sharks have spiracles?

Most other shark species can breathe while stationary, by drawing water through their mouths (or through an opening behind each eye, known as a spiracle) and passing it over their gills. ... As to whether those leopard sharks on the bottom of Open Sea are actually sleeping, it's certainly possible.

What are shark arms called?

Most sharks have eight fins: a pair of pectoral fins, a pair of pelvic fins, two dorsal fins, an anal fin, and a caudal fin. Pectoral fins are stiff, which enables downward movement, lift and guidance.