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Studies on the morphology and. A males testes produce sperm and a females ovaries produce eggs ova.
MALE REPRODUCTIVE SYSTEM IN INSECTS Introduction The male insect has male reproductive system in the abdominal cavity.
Male reproductive system of insects. MALE REPRODUCTIVE SYSTEM IN INSECTS Introduction The male insect has male reproductive system in the abdominal cavity. It is elongated and presented above the intestine of the insect. Male reproductive system of insect is typically consisted into following parts or organ- 1.
Anatomy of the internal reproductive organs The male reproductive organs typically consist of a pair of testes connecting with paired seminal vesicles and a median ejaculatory duct Fig. In most insects there are also a number of accessory glands which open into the vasa deferentia or the ejaculatory duct. The male reproductive system of insects can have several tissues responsible for the secretion of seminal fluid proteins SFPs such as testes accessory glands seminal vesicles ejaculatory duct and ejaculatory bulb.
Male reproductive system in Triatominae consist of a pair of testes two vas deferens two seminal vesicles four pair of accessory glands and one ejaculatory duct which open in aedeagus Barth 1958 Freitas et al 2008. Adult males of D. Armandi were collected from the bark of infested P.
Armandi in the Huoditang Experimental Forest Station Qinling Mountains 33 1833 28 N 108 21108 39 E in 13 July 2015 30 insect samples were used in each developmental stage and the microstructure of the tissue samples were magnified via a stereomicroscope the reproductive organs located near the. Insect Reproduction function of male reproductive system make spermatozoa storage send them off with proteins with many functions deliver the whole package to the females testes seminal vesicles accessory glands external genitalia general plan of male reproductive system testis follicles 1-100 testes can be separate of. Very useful for BSc and MSc students of zoology entomology and life-science.
Male Reproductive System. Testes - Usually near the back of the abdomen. Each testes is subdivide into functional units - Follicles - sperm is produced.
At the distal end of each follicle-group of germ cells - Spermatogonia. Spermatogonia - divide by mitosis -. Generalized male and female systems are depicted in Fig.
320 and a comparison of the corresponding reproductive structures of male and female insects is provided in Table 32. Many other aspects of reproduction including copulation and regulation of physiological processes are discussed in detail in Chapter 5. In most insects the male reproductive system is formed by one pair of testes linked to a seminal vesicle by vasa deferentia accessory glands and an ejaculatory duct.
However modifications and adaptations in the male reproductive systems can be found 8. Studies on the morphology and. In the vast majority of insects the male transfers sperm directly into the female reproductive system with the spermatozoa either free in fluid or encased in a capsule of various chemical composition to form a sperm packet or spermatophore.
Reproductive system of insects 1. STRUCTURE OF THE MALE REPRODUCTIVE SYSTEM The basic component of the male reproductive system is the testis Fig. STRUCTURE OF THE MALE REPRODUCTIVE SYSTEM However most male insects have a pair of testes inside of which are.
STRUCTURE OF THE MALE. Reproductive System The reproductive organs of insects are similar in structure and function to those of vertebrates. A males testes produce sperm and a females ovaries produce eggs ova.
Both types of gametes are haploid and unicellular but eggs are usually much larger in volume than sperm. The ninth chapter covers endocrine influence on reproduction in the male insect. The next chapters discuss oviposition heterogony and viviparity.
The last two chapters deal with functional hermaphroditism and insect societies respectively. The book will be of great use to students and researchers in the field of entomology. The chapter describes the main and accessory organs of male and female reproductive systems in insects including development of these organs and of eggs and sperm.
It also discusses the physiological processes involved in vitellogenesis ovulation fertilization oviposition and spermatogenesis and endocrine control of these processes in insects. MALE BLOWFLY REPRODUCTIVE TRACT fat body testis Paragonia or accessory reproductive glands Vas deferens Ejaculatory duct Penis or aedeagus Ejaculatory sac Vas efferens Phormia regina mating Merritt D C-M.