![The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BREATHING MECHANISM OF THE LAMPREYS. ^ forms a short tube connecting the gill sac with the exterior. The ental valves extend lat- erad The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BREATHING MECHANISM OF THE LAMPREYS. ^ forms a short tube connecting the gill sac with the exterior. The ental valves extend lat- erad](https://c8.alamy.com/comp/RHPD5Y/the-biological-bulletin-biology-zoology-biology-marine-biology-breathing-mechanism-of-the-lampreys-forms-a-short-tube-connecting-the-gill-sac-with-the-exterior-the-ental-valves-extend-lat-erad-and-at-the-same-time-dorsad-and-ventrad-to-the-outer-end-of-the-tubular-branchiopore-to-which-the-ectal-valve-is-attached-each-has-its-concave-face-outward-and-the-two-cover-about-two-thirds-of-the-lumen-of-the-branchiopore-each-overlaps-its-fellow-by-nearly-half-its-dorso-ventral-diameter-the-ectal-valve-is-a-thin-flg-10-the-external-branchiopore-show-membrane-which-is-attached-i-RHPD5Y.jpg)
The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BREATHING MECHANISM OF THE LAMPREYS. ^ forms a short tube connecting the gill sac with the exterior. The ental valves extend lat- erad
![An 8-week fetus associated with a large (at least two-thirds of the... | Download Scientific Diagram An 8-week fetus associated with a large (at least two-thirds of the... | Download Scientific Diagram](https://www.researchgate.net/publication/267813307/figure/fig7/AS:341836414636034@1458511560058/An-8-week-fetus-associated-with-a-large-at-least-two-thirds-of-the-chorionic-sac.png)
An 8-week fetus associated with a large (at least two-thirds of the... | Download Scientific Diagram
![a) Cross section through the lower part of the lacrimal sac (male, 81... | Download Scientific Diagram a) Cross section through the lower part of the lacrimal sac (male, 81... | Download Scientific Diagram](https://www.researchgate.net/publication/12563317/figure/fig2/AS:394414192119812@1471047079283/a-Cross-section-through-the-lower-part-of-the-lacrimal-sac-male-81-years-with.png)
a) Cross section through the lower part of the lacrimal sac (male, 81... | Download Scientific Diagram
![SOLVED: Which of the following statements is NOT true about the shape, position, and location of the heart?a. The heart is enclosed in a double-layered sac called the pleural membrane. b. Approximately SOLVED: Which of the following statements is NOT true about the shape, position, and location of the heart?a. The heart is enclosed in a double-layered sac called the pleural membrane. b. Approximately](https://cdn.numerade.com/ask_previews/19e1fb08-b26d-4c7c-8c0a-2e1fdc02fb92_large.jpg)
SOLVED: Which of the following statements is NOT true about the shape, position, and location of the heart?a. The heart is enclosed in a double-layered sac called the pleural membrane. b. Approximately
![An American text-book of obstetrics. For practitioners and students. squamous epithelium withinthe lower third. In the upper half or two-thirds of the cervix the epitheliumis ciliated columnar, similar to that of An American text-book of obstetrics. For practitioners and students. squamous epithelium withinthe lower third. In the upper half or two-thirds of the cervix the epitheliumis ciliated columnar, similar to that of](https://c8.alamy.com/comp/2CEXCT5/an-american-text-book-of-obstetrics-for-practitioners-and-students-squamous-epithelium-withinthe-lower-third-in-the-upper-half-or-two-thirds-of-the-cervix-the-epitheliumis-ciliated-columnar-similar-to-that-of-the-body-in-addition-to-the-tubularfollicles-the-representatives-of-the-usual-uterine-glands-numerous-short-widely-expanded-mucous-crypts-lie-within-the-cervical-mucosa-retention-of-thesecretion-of-some-of-these-mucous-sacs-often-takes-place-the-resulting-greatlydistended-cysts-appearing-as-translucent-yellowish-vesicles-the-so-called-ovulcenabothi-in-its-meagre-supply-of-gl-2CEXCT5.jpg)
An American text-book of obstetrics. For practitioners and students. squamous epithelium withinthe lower third. In the upper half or two-thirds of the cervix the epitheliumis ciliated columnar, similar to that of
![Zoology : for students and general readers . Zoology. HAIR AND HORNS OF MAMMALS. 561 the limb from the body becomes more marked as we ap- proach man. In the seal, Zoology : for students and general readers . Zoology. HAIR AND HORNS OF MAMMALS. 561 the limb from the body becomes more marked as we ap- proach man. In the seal,](https://c8.alamy.com/comp/RD9RN9/zoology-for-students-and-general-readers-zoology-hair-and-horns-of-mammals-561-the-limb-from-the-body-becomes-more-marked-as-we-ap-proach-man-in-the-seal-only-the-wrist-protrudes-from-the-skin-the-limb-of-the-otter-slightly-more-the-horses-leg-does-not-protrude-beyond-the-elbow-that-of-the-monkey-projects-two-thirds-of-its-length-while-in-man-the-limbs-become-wholly-free-from-the-trunk-wyman-the-hairs-originate-in-minute-sacs-which-extend-from-the-epidermis-into-the-cutis-from-the-bottom-of-this-inpushing-of-the-epidermis-grows-up-the-shaft-of-the-hair-which-is-fig-486-RD9RN9.jpg)